So what if he is paid £900k - he runs a massive company and thousands of jobs depend on that company remaining profitable and his decisions are central to that. Its a huge responsibility.
PaulB - it is the easiest thing to go into denial and to disbelieve 'what may happen' but the fact is we have evidence of it actually happening, overseas and here. We have seen the tax take increase from the top 10% earners when the top rates are cut. This is not theory.
Neither is it only about going abroad either. People with that kind of income often have influence of how they take their income and how much they take. Why should they take extra risk, why work extra hours, why start new enterprises, why develop new product lines, why take on more staff - if at the end of it you lose more than half what you earn?
Many people I know (and advise) limit their hours of work and size of businesses to keep their income just below the 40p rate because they feel its not worth the bother and risk. It would be much worse at the 50p level.
Only envy drives this need some feel to punish the better off regardless of the consequences. But then there are some people who enjoy S&M - it takes all types I suppose...
