The morality of taxation

Morally, does it matter how rich the rich are? Or should our real concern be how poor the poor are? There was a great edition of The Moral Maze on Radio 4 last night, with debate sparked by the growing lobby calling for the 50% rate of income tax to be cut. The programme is available on i-player here, and it is really worth spending 43 minutes to listen to it - perhaps as preparation for a classroom debate.