Jimmy Carr is obviously a monumental hypocrite for seeking to avoid taxes while satirising people who avoid taxes.
That said who is worse for the British tax-payer, celebrities who aggressively avoid paying taxes on the one hand or a luvvie who diligently pays every penny asked of him, but whose work is largely funded by the tax payer in the first place?
Jimmy Carr makes close to 100% of his income privately and gives maybe 2% to the public coffers.
Compare him to a film director subsidised by the state who gets 100% of his livelihood from the public and gives 50% back.
It's not the Jimmy Carrs of this world who are depleting the public purse.