Klaus,
I do not have any kind of revenue in mind, I leave that to the number crunchers. !
It appears to me that it is odd, that in a recession our tax workings have benefited those (really better off) v ( the less well off).
It appears to me we have a Thatcherite aversion to looking @ fairness .
It appears to me we also have a cohort of people who believe there is a magic pot of {wealthy} people waiting to be tax plucked.
It appears to me we also have inculcated an entitlement culture on the (can,t pay, won,t pay ) model.
The Question was asked (why so much tax?)
It is very simple , to pay for services.
The harder question is whether, we the voters accept ,more services = more taxes.
efficient services = vote losing decisions.
I would hope that if voters could see that taxes are spent fairly well ,we would not have your question.
I would worry that Governments have reduced Governance to seeing how they can juggle books in short -term market management , forgetting they are managing a society not a PLC ?