The selfish rich

A question. Why are rich people so reluctant to pay their fair share of tax? They have enough money to be able to pay but they call it economic. In the scheme of things it is as much moral question as economic. They should see that they have a duty to pay taxes in the same way as ordinary citizens. In many cases the money they have has come from ordinary tax payers. They should be ashamed. The trouble is that the government of the UK is made up of people who support the rich being rich themselves.