SIR – If David Cameron thinks Jimmy Carr’s tax dodge was morally wrong, why isn’t he using his powers as Prime Minister to stop this kind of thing happening? At the moment Cameron seems to hope that a few sound bites on TV will be enough to make the fuss die down.

Tax dodging costs the rest of us billions of pounds – money that could be spent on hospitals, schools and policemen. But while David Cameron talks tough, the truth is that he could be doing much more to stop it.

Leading tax experts say what we need is a legally-enshrined “general avoidance principle” – giving courts tough new powers to force dodgers to pay up.

Honest taxpayers and small businesses are being made a mockery of by those who can afford fancy lawyers to dodge their tax.

Linda Arnold, Beech Street, Bingley