It seems referenda on Europe are all the rage. Of course, the authorities in Brussels hate this democracy stuff. As we saw over the European Constitution, the proletariat simply cannot be trusted to give the right answer.
For the euro-apparatchiks, the way to sort out disagreement is for the right people (them) to discuss it over a series of lunches paid for by the taxpayer and come to a conclusion which fits the overall plan of ever closer union.
They have made clear their anger at this dangerous new outbreak of populism by withdrawing the offer on which the Greek people will vote.