Unless people, when they leave, take their money with them; further, hyper taxation always hits the poor as well as the rich, and as soon as you start making money you get even more hammered for it.
Even further, such a State (like the Labour one now being dismatled) has greater incentives not to work than to make money.
Ergo, tax revenue falls, so welfare dries up, so everyone ends up wretched. It has always happened in every instance, and the harder you push the worse it gets. Witness the difference between 1970's Britain and the Soviet Union; the latter took the doctrine to the extreme and the former was only rescued from complete ruin by Thatcher's own brutal form of politics, far more ruthless than Cameron and Clegg today.
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