Usually the share of contributions to the EU by national states are proportional to GDP. So everybody (who adopted the Euro) is contributing, but Germany has the biggest proportion. A lot of haggling was needed to convince Finland to contribute...
The reason for the "haggling" was that there was parlamentary elections in Finland and the presidential elections is also pretty soon so the populists are playing their games.. I'd say most Finns just as happy to contribute as everyone else.
That's how the rich get richer, Germany is in a realistic position to create it's own currency. Germany has better leverage over the situation than the Irish, hence they pay less.
