There is no money tree anymore

I understand why Greek citizens protesting spending cuts implemented by their government are upset, but I don't quite get what their protests are supposed to accomplish. What exactly do they think is supposed to happen? There is no money. It's not like the Greek government has a stash hidden away somewhere; it is actually bankrupt. Sure, it's getting huge foreign grants, but that money has to be used to pay down at least part of Greece's gigantic liabilities; no one is giving Greece money so that it can continue on its old consumption path. Which, as shown by the bankruptcy, was pretty much unsustainable.