Quoted:
The EU wants to take 10% or so of deposits to fund government.
They're not funding government with it, not in the sense you're probably thinking.
The banks in Cyprus are, like many banks both here and in the EU - insolvent. Kaput. Done. There is some pretty elaborate sleight of hand to make it look like they're not, but honestly the only thing keeping them from failing immediately is that people assume they're solvent.
Basically, people know the money isn't there on the balance sheets but they're simply pretending it is. The typical man on the street is mostly unaware of this.
Now, the banks in Cyprus are worse off than most in the EU; it got bad enough that the ECB told them that unless they accept a bailout, the ECB will not keep providing them with liquidity (lending them money on and off to cover various bank related day to day crap). It's sort of like an intervention. However, to set the banks right they need to dump in several billions of euros to fill the balance sheet holes. Nobody is willing to pony up the cash and Germany, etc. are sort of pissed at this point, so they're taking several billion euros of customer deposits to provide some of that money.
Compared to the overall EU expenditures, the money is a drop in the bucket. It's not being taken and spent anywhere- it's simply being poured down a hole to fill in accounting fuckups, the idea being they need to pretend they're on the up and up. The various tin-pot governments they let into the EU are pissing away money they don't have left and right, and cheating the system and hurting the other members in the process. EU can't let it go on. Problem is, now they're going to create a bank run. They fucked up big time.
Many bankers are every bit as much to blame as the governments on this one - they're often the same people, revolving-door style.
Contrast this whole mess to the US, where they simply print whatever they want in whatever amount they want, and pretend a reckoning will never come (or that if it does, they'll be out on their yacht not giving a fuck).