Greece has been allowed to collapse because it's expendable. It makes up about 2% of European GDP but, as a developed nation, it's downfall will scare the other EU countries, particularly the economically unstable ones enough for the 'EU' to push forward with it's closer union, and continue to erode (centralise) power away from independent Governments.
In other words, the apparent stupidity of the Greeks, and EU governments is frankly, just too stupid to be a mistake. Any, economist or politician with half a brain would take one look at the Eurozone proposal from 1992 and see it was doomed from the out set.
Where I disagree with Mugwump, is his assumption that industry hates government. I actually think 'Big Government' and 'Big business' go hand in hand. Corporate oligarchs love big government, because they have the power to pass legislation, and have the army's to enforce them. I'd also argue, that FDR was as much of a puppet as any other leader.
Globalisation has slowly been expanding on the back of currency meddling, and insidious 'trade agreements', and it's these 'trade agreements' (e.g. TTP, NAFTA) that are the real driving force behind 'closer union'. Lest we forget the EU was originally founded on a series of 'trade agreements' giving member states control over German trade and industry.
Now, whether you believe in a global 'conspiracy' is your prerogative however, it's a fact that a select group of individuals, with links to the same families founded and finance major global entity's that have influence every facet of our lives.
Examples include:
The W.H.O, UN, W.T.O, the banks, and Time Warner (the worlds biggest media conglomerate), and the founding of the state of Isreal.