It's not that politicians are idiots.
This is the politician who is running the largest ministry (Social) in Germany at 145 Billion Euro. Look at that impressive resume:
http://en.wikipedia.org/wiki/Andrea_NahlesFrankly, I'd not even hire this person as a cashier in a grocery store.
Remember the Wiso survey of MPs in the German parliament when they were doing the ESM vote? Most MPs didn't have a clue that it was 211 Billion nominal and none of them knew that it is potentially unlimited. They also didn't know that they were about to vote for immunity of the fund managers. They essentially handed over the power over the German budget to the ESM without even knowing it. Dito in other EMU countries.
You may be right, they may not all be idiots.
But they are also not the people who are truly running the show. Those people who are really running the show could not care less about a good implementation of some BIG scheme. It will either fit their agenda or it won't. If it does fit it will be implemented in such a way as to fit the agenda best.