Top bankers destroy value

According to a recently published study bankers negatively contribute to society whilst nurses and teachers and other providers of essential services have had their pay cut in real terms, so that massive distortions now exist in the remuneration structures in the UK.

Has any parasite done anything else other than destroy its host?

The solution is not a tax on bonuses.  The solution is to outlaw the practices that are themselves damaging to society – namely embezzlement and counterfeiting.