UK incomes are decoupling from economic health

Has the typical family gained from the UK's growth since the 1970s?

On both sides of the atlantic, there has been a relatively long-running debate about the extent to which "decoupling" – the failure of typical household incomes to grow at a rate matching the increase in GDP – has occurred.

The classic treatment of the topic compares GDP per capita to the median family income, as Lane Kenworthy did for the USA:

The difference is clear, albeit not entirely unsurprising (what the graph shows is largely the result of the large increase in income inequality since the 1980s). Yet not everyone accepts that it demonstrates a real phenonmenon.

Kenworthy writes:

One objection is that the price deflator typically used to adjust GDP per capita for inflation differs from the deflator used for median family income. I’ve addressed that here by using the same deflator for both.

A second concern has to do with GDP per capita as an indicator of economic advance. Since the 1970s a larger portion of GDP has gone to replace old capital equipment and therefore can’t go to household income. Also, the number of persons has increased less rapidly than the number of households, so a per capita (per person) measure of GDP could mislead.

A third worry is that the income measure used to calculate median family income is too thin. If a growing portion of GDP has gone to employer benefits, that would help middle-class households, but it wouldn’t show up in these income data.

He addresses the second and third concerns by using a per-household measure, which includes in-kind payments and the effects of taxation. The result is a very similar graph:

This demonstrates, he says, that "decoupling is real and sizeable".

But what about the UK? Have we got the same problem? Yes:

All the data comes from the ONS, the inflation measure used is RPI, and both median and mean household income are taken measured from after the application of taxes and distribution of benefits.

Just as in the US, income growth for middle-class households has become decoupled from growth of the economy.

Stocks are up in the NYSE, but real incomes aren't. Credit: Getty

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

Photo: Getty
Show Hide image

Cabinet audit: what does the appointment of Liam Fox as International Trade Secretary mean for policy?

The political and policy-based implications of the new Secretary of State for International Trade.

Only Nixon, it is said, could have gone to China. Only a politician with the impeccable Commie-bashing credentials of the 37th President had the political capital necessary to strike a deal with the People’s Republic of China.

Theresa May’s great hope is that only Liam Fox, the newly-installed Secretary of State for International Trade, has the Euro-bashing credentials to break the news to the Brexiteers that a deal between a post-Leave United Kingdom and China might be somewhat harder to negotiate than Vote Leave suggested.

The biggest item on the agenda: striking a deal that allows Britain to stay in the single market. Elsewhere, Fox should use his political capital with the Conservative right to wait longer to sign deals than a Remainer would have to, to avoid the United Kingdom being caught in a series of bad deals. 

Stephen Bush is special correspondent at the New Statesman. He usually writes about politics.