Yeah and I suppose in general the higher the earner the more senior in years and therefore the less (to use a little business-book jargon) footloose they are, their 'feet' 'tied' to the country. I suppose you could criticise mammoth taxes on high-earners from the point of view of a lack of attractiveness to high quality workers from abroad coming here. But perhaps, from a regulatory competition perspective, that is offset by high taxes in many jurisdictions at the moment.
I suppose the nub of Neil's point is that the innovators/entrepreneurs (those who really drive the economy rather than just facilitate development, say) - that those people should be pandered to with tax-breaks (perhaps more so than sportstars and artists?).
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