It would be interesting to calcuate how much you actually pay in tax through a year and convert that to a percentage. For higher tax earners, I really would not be surprised if it breached 50%.
Sue I saw a figure somewhere for an average 40% tax payer family doing normal stuff accounting for vat on purchares, direct tax and NI, council tax, fuel duty, vehicle excise etc it worked out to be 59% of your earnings.