There are problems with wealth taxes but avoidance, for once, isn't one of them

Taxing illiquid assets is, well, taxing.

Fraser Nelson, editor of the Spectator, has a column in today's Telegraph arguing that George Osborne needs to learn the lesson that "wealth taxes simply don't work". He writes:

The problems involved were fairly basic. Do you tax people’s worldwide wealth? If so, those much-needed businessmen will stay away. Do you tax only British wealth? Then people will move their investments abroad. The Treasury warned Healey that the proposed wealth tax was “political dynamite” – and not in a good way. At a time when Britain was in a desperate economic state, it risked dragging the country down further still. Healey gave up, saying he could not find any wealth tax that would be worth the political hassle.

This is disappointing, because Nelson is largely duelling with straw men here. It is indeed true that a tax on overall wealth could well lead to tax avoidance by the relatively simple tax planning strategy known as "keeping your cash in a Swiss bank account". The thing is, that isn't actually that much of a problem. After all, people avoid income tax as well, yet somehow we struggle on.

The measure for a tax is never "will everyone pay it rather than put their energy into avoiding it?", but "will enough people pay it to make it worth our while?" That's a different calculus, and one which Nelson doesn't address.

But the real disappointment is that, for all Nelson talks about the rising support for a wealth tax, he neglects to mention that most of that support is for taxing a very specific type of wealth: property. It's a shame, because that sort of tax – a "mansion tax", a "land value tax", or whatever form it takes – has its own set of problems which are under-discussed.

The important thing to note about property taxes do is that they completely fix the problems Nelson is concerned about when it comes to wealth taxes in general. You can keep money overseas, but a house in Britain is rather stuck where it is. To the extent that such a tax it increases the cost of living in Britain, it may keep wealthy foreigners away – but only those who haven't already been put off by the extraordinary cost of the sort of houses wealthy foreigners buy.

The thing is, land and property taxes aren't the golden bullet that many on the left like to think, for the key reason that houses aren't particularly liquid assets.

We've all heard the sob-story of the elderly pensioner who could be forced to sell the house he's lived in all his life to pay the land value tax (although we rarely hear it alongside its counterpart, the elderly pensioners who are being forced to moved out of houses they've lived in all their lives because of benefit cuts), but the key concern with such a tax is related to that problem.

If you are taxed, say, 20 per cent of your cash holdings, you pay that tax by handing 20 per cent of your cash to HMRC. If you are taxed on 20 per cent of the value of your land, you can't just hand a wing of your house over to the taxman. You either have to have the cash equivalent available, or sell your house.

Taken individually, that's not the end of the world – few will cry too hard if the odd landowner has to sell a few acres to pay the bill. The problem comes if the tax is set high enough that that sort of sale becomes commonplace.

If too many people end up trying to sell their mansions or land at the same time, then you're stuck with a sadly inevitable collapse in the price that land can go for. That's not just unfair – it means you would be taxing people on assets which are no longer worth what they were when you assessed them – it's also staggeringly inefficient. A well-designed tax should not encourage a fire-sale of assets.

These problems aren't insurmountable, by any means. But they do give pause for thought when considering the truely radical proposals like Peter Tatchell's plan to set the wealth tax rate at 20 per cent. Although back-of-the-envelope calculations suggest such a tax would generate truly staggering revenue, a more modest rate would be a better idea – at least at the start.

This mansion, in Kensington, London, was once the most expensive in the world. What'd the tax be? Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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This Ada Lovelace Day, let’s celebrate women in tech while confronting its sexist culture

In an industry where men hold most of the jobs and write most of the code, celebrating women's contributions on one day a year isn't enough. 

Ada Lovelace wrote the world’s first computer program. In the 1840s Charles Babbage, now known as the “father of the computer”, designed (though never built) the “Analytical Engine”, a machine which could accurately and reproducibly calculate the answers to maths problems. While translating an article by an Italian mathematician about the machine, Lovelace included a written algorithm for which would allow the engine to calculate a sequence of Bernoulli numbers.

Around 170 years later, Whitney Wolfe, one of the founders of dating app Tinder, was allegedly forced to resign from the company. According to a lawsuit she later filed against the app and its parent company, she had her co-founder title removed because, the male founders argued, it would look “slutty”, and because “Facebook and Snapchat don’t have girl founders. It just makes it look like Tinder was some accident". (They settled out of court.)

Today, 13 October, is Ada Lovelace day – an international celebration of inspirational women in science, technology, engineering and mathematics (STEM). It’s lucky we have this day of remembrance, because, as Wolfe’s story demonstrates, we also spend a lot of time forgetting and sidelining women in tech. In the wash of pale male founders of the tech giants that rule the industry,we don't often think about the women that shaped its foundations: Judith Estrin, one of the designers of TCP/IP, for example, or Radia Perlman, inventor of the spanning-tree protocol. Both inventions sound complicated, and they are – they’re some of the vital building blocks that allow the internet to function. 

And yet David Streitfield, a Pulitzer-prize winning journalist, someow felt it accurate to write in 2012: “Men invented the internet. And not just any men. Men with pocket protectors. Men who idolised Mr Spock and cried when Steve Jobs died.”

Perhaps we forget about tech's founding women because the needle has swung so far into the other direction. A huge proportion – perhaps even 90 per cent - of the world’s code is written by men. At Google, women fill 17 per cent of technical roles. At Facebook, 15 per cent. Over 90 per cent of the code respositories on Github, an online service used throughout the industry, are owned by men. Yet it's also hard to believe that this erasure of women's role in tech is completely accidental. As Elissa Shevinsky writes in the introduction to a collection of essays on gender in tech, Lean Out: “This myth of the nerdy male founder has been perpetuated by men who found this story favourable."

Does it matter? It’s hard to believe that it doesn’t. Our society is increasingly defined and delineated by code and the things it builds. Small slip-ups, like the lack of a period tracker on the original Apple Watch, or fitness trackers too big for some women’s wrists, gesture to the fact that these technologies are built by male-dominated teams, for a male audience.

In Lean Out, one essay written by a Twitter-based “start-up dinosaur” (don’t ask) explains how dangerous it is to allow one small segment of society to built the future for the rest of us:

If you let someone else build tomorrow, tomorrow will belong to someone else. They will build a better tomorrow for everyone like them… For tomorrow to be for everyone, everyone needs to be the one [sic] that build it.

So where did all the women go? How did we get from a rash of female inventors to a situation where the major female presence at an Apple iPhone launch is a model’s face projected onto a screen and photoshopped into a smile by a male demonstrator? 

Photo: Apple.

The toxic culture of many tech workplaces could be a cause or an effect of the lack of women in the industry, but it certainly can’t make make it easy to stay. Behaviours range from the ignorant - Martha Lane-Fox, founder of, often asked “what happens if you get pregnant?” at investors' meetings - to the much more sinister. An essay in Lean Out by Katy Levinson details her experiences of sexual harassment while working in tech: 

I have had interviewers attempt to solicit sexual favors from me mid-interview and discuss in significant detail precisely what they would like to do. All of these things have happened either in Silicon Valley working in tech, in an educational institution to get me there, or in a technical internship.

Others featured in the book joined in with the low-level sexism and racism  of their male colleagues in order to "fit in" and deflect negative attention. Erica Joy writes that while working in IT at the University of Alaska as the only woman (and only black person) on her team, she laughed at colleagues' "terribly racist and sexist jokes" and "co-opted their negative attitudes”. 

The casual culture and allegedly meritocratic hierarchies of tech companies may actually be encouraging this discriminatory atmosphere. HR and the strict reporting procedures of large corporates at least give those suffering from discrimination a place to go. A casual office environment can discourage reporting or calling out prejudiced humour or remarks. Brook Shelley, a woman who transitioned while working in tech, notes: "No one wants to be the office mother". So instead, you join in and hope for the best. 

And, of course, there's no reason why people working in tech would have fewer issues with discrimination than those in other industries. A childhood spent as a "nerd" can also spawn its own brand of misogyny - Katherine Cross writes in Lean Out that “to many of these men [working in these fields] is all too easy to subconciously confound women who say ‘this is sexist’ with the young girls who said… ‘You’re gross and a creep and I’ll never date you'". During GamerGate, Anita Sarkeesian was often called a "prom queen" by trolls. 

When I spoke to Alexa Clay, entrepreneur and co-author of the Misfit Economy, she confirmed that there's a strange, low-lurking sexism in the start-up economy: “They have all very open and free, but underneath it there's still something really patriarchal.” Start-ups, after all, are a culture which celebrates risk-taking, something which women are societally discouraged from doing. As Clay says, 

“Men are allowed to fail in tech. You have these young guys who these old guys adopt and mentor. If his app doesn’t work, the mentor just shrugs it off. I would not be able ot get away with that, and I think women and minorities aren't allowed to take the same amount of risks, particularly in these communities. If you fail, no one's saying that's fine.

The conclusion of Lean Out, and of women in tech I have spoken to, isn’t that more women, over time, will enter these industries and seamlessly integrate – it’s that tech culture needs to change, or its lack of diversity will become even more severe. Shevinsky writes:

The reason why we don't have more women in tech is not because of a lack of STEM education. It's because too many high profile and influential individuals and subcultures within the tech industry have ignored or outright mistreated women applicants and employees. To be succinct—the problem isn't women, it's tech culture.

Software engineer Kate Heddleston has a wonderful and chilling metaphor about the way we treat women in STEM. Women are, she writes, the “canary in the coal mine”. If one dies, surely you should take that as a sign that the mine is uninhabitable – that there’s something toxic in the air. “Instead, the industry is looking at the canary, wondering why it can’t breathe, saying ‘Lean in, canary, lean in!’. When one canary dies they get a new one because getting more canaries is how you fix the lack of canaries, right? Except the problem is that there isn't enough oxygen in the coal mine, not that there are too few canaries.” We need more women in STEM, and, I’d argue, in tech in particular, but we need to make sure the air is breatheable first. 

Barbara Speed is a technology and digital culture writer at the New Statesman and a staff writer at CityMetric.