Ministers lose the argument on "unaffordable" pensions

Francis Maude flounders as he fails to defend the claim that public sector pensions are "unaffordabl

The first mass strikes since the general election are officially underway. The Public and Commercial Services Union (PCS) and three teaching unions - the National Union of Teachers (NUT), the Association of Teachers and Lecturers (ATL) and the University and College Union (UCU) - have all taken industrial action over planned changes to public sector pensions. A third of schools are expected to close, with another third "partially affected", and two-thirds of universities have cancelled lectures.

Ministers are generally bullish, holding the line that the public "won't understand" the strikes, but on at least one key point - the alleged "unaffordability" of public sector pensions - they've lost the argument this morning. Confronted by the formidably articulate PCS general secretary Mark Serwotka (recently interviewed by Mehdi for the NS) on the Today programme, Francis Maude floundered. Asked to justify the government's repeated claim that public sector pensions are "unaffordable" (David Cameron claimed that the system was in danger of going "broke" in his speech on Monday), the Cabinet Office minister simply couldn't. And he couldn't because the data tells a different story.

As the graph below from the government-commissioned Hutton Report shows, public sector pension payments peaked at 1.9 per cent of GDP in 2010-11 and will gradually fall over the next fifty years to 1.4 per cent in 2059-60. The government's plan to ask employees to work longer and pay more is a political choice, not an economic necessity.

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As the Public Accounts Committee observed: "Officials appeared to define affordability on the basis of public perception rather than judgement on the cost in relation to either GDP or total public spending." In other words, the public have been misled and ministers are determined to keep misleading them. Unable to justify the myth that public sector pensions are "unaffordable", the desperate Maude fell back on the claim that they are "untenable", without having the decency to explain why this was so.

Continuing the cynical attempt to set public and private sector workers against each other, Maude commented: "not very many people in the private sector can still enjoy pensions like that." True, two-thirds of private-sector employees are not enrolled in a workplace pension scheme, compared to just 12 per cent of public-sector workers. But this is an argument for improving provision in the private sector, not for driving it down in the public sector. Ministers appear determined to fire the starting gun on a race to the bottom.

We can debate the merits of industrial action as a form of protest. But with public sector workers facing a triple crunch - higher contributions, a tougher inflation index and lower benefits - it's hardly surprising that they feel compelled to defend their rights. Even before any of the Hutton reforms are introduced, George Osborne's decision to uprate benefits in line with CPI, rather than the RPI, has already reduced the value of some pensions by 15 per cent.

Strip away the government's rhetoric ("unaffordable", "untenable") and the truth is that ministers are forcing workers to take another pay cut, forcing them to pick up the tab for a crisis that they did not cause. The public might be on the side of ministers, for now at least, but the facts are on the side of the unions.

George Eaton is political editor of the New Statesman.

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Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.