Ed Balls and fifty pence

Ed Balls says that Labour will bring back the upper rate of income tax to fifty pence in the pound for people earning £150,000 and above. Just high enough to not affect the income tax rate of ministers. Whilst people on lower wages may agree with this perhaps it would be better on getting the correct income tax from millionaires and others who avoid paying their correct dues, buy tax avoidance schemes and putting their money in off shore tax havens. This would raise billions in revenue not millions that may be raised from increasing income tax from those earning £150,000.  Because nobody on either side of the debate know how much would be raised from such a proposal.