You can find more online rather than me typing it all out, but one thing that really made me angry as an example is this (from a while ago, but still):
^ £1.7 Billion Bill in 2014 from the EU. Most other countries got payment to them, including Germany who have a better economy. Cameron said he wouldn't pay, but, oh look - he paid:
Quite how Greece, who were totally up **** creek got a £70m bill to pay, I don't know. Sure EU, it makes sense to hit a country that is totally screwed already with a bill. That makes LOADS of sense. Italy too that are in trouble were billed £268m. Its like we were fined for doing well and had to help the rest! Do better yourself rather than us. This time we cant help you as we are gone soon.
Just do your own research about the different issues.