It looks a good idea and I don't think anyone could argue against some wealth redistribution, but there is also a big proviso that the tax is efficiently collected and distributed to those needing it the most.
If they are really want to do it, I am sure there are better ways than merely imposing a higher tax.
Nice to read. It usually seems that the richer the person the less keen they are on paying taxes. I find it sad that wealthy men/women give so much to charity (ego boost, maybe?) and yet when it comes to taxes move abroad and use every means possible to avoid paying anything.
The people who give most to charity don't move to avoid tax (eg. Bill Gates or Warren Buffett). But then in the UK top tax payers pay a large percentage of tax, and they may not think the government make the best use of the money they get (that's why Charity is more attractive).