It's an appalling arrangement whereby we are and have been, higher net contributers to the budget than France and other richer countries due to the cozy relationship between the French and Germans and the ridiculous CAP.
But kept our own currency so we can control our own monetary policy. Also not part of Schengen so we pay a bit more. I.e. We have lots of controls others don't. Up to us how we use them. So we pay more to get benefits but keep more controls - seems fair enough.