Barack Obama knows that a tax rise of those proportions in the US would be politically suicidal, so he proposes a much more modest increase – an income tax rate of around 40 per cent on the highest earners sounds very modest indeed to British ears. But that is precisely the problem. If a tax rise is modest enough to be politically acceptable to much of the electorate, it will not produce anything like enough to finance the universal American entitlement programmes, social security and Medicare, into a future with an ageing population. There is no way that “taxing the rich” – that irresistibly glib Left-wing solution to everything – can make present and projected levels of government spending affordable. That is why Britain and almost all the countries of the EU have redefined the word “rich” to mean those who are earning scarcely twice the average wage, and pulled more and more middle-income people into high tax bands. Not only are there vastly more of them but they are far more likely to stand still and be fleeced, because they do not have the mobility of the truly rich.