The self-delusion of British and EU politicians
It is by no means certain that the present crop of Europe's leaders would not resort to a similar ploy if placed in a similar situation. In Britain the coalition government leaders attempted an exactly equal stupidity when in setting up their deal, they believed that by placing a time limit on their compact, they could thus suspend reality. EU leaders daily live out a similar stupidity over the Euro currency, when they repeat that EMU is a political project and thereby able, in some mysterious way, to suspend all the laws of economics by which the rest of humanity must live.
The concluding paragraph of the introduction to the Cameron Clegg Coalition Agreement, linked here in pdf format, states the following:
A government that depends on a majority vote, in an elected parliament for its survival, as Cameron and Clegg are, no doubt, soon to discover, (even in the disgraceful and corrupt party political system in place at Westminster,) cannot long survive when they have lossed support in the Country and the MPs therein depend for their livliehoods on the continued support of the duped voters they have for long ignored and impoverished.
Whether or not that lesson will be first learnt within the EU or at Westminster, is one of the few remaining uncertainties presently remaining in Europe's political mess.