I see no reason why the other countries should continue shovelling in their hard-earned money to prop up a corrupt and spendthrift little nation.
It will be very bad for the Greeks when they leave the Euro, but if they can't run their own economy, they shouldn't be allowed to drag down the other nations.
The countries who have put their hands deepest into their pockets are actually resented by many of the Greeks, who see it as a slur on their national pride. If they aren't going to pay back the loans or fulfil their promises, they obviously can't expect more money to be showered on them.