Hollande's Master Plan

So Hollande has promised to tax the "rich" by 75% of their income.

Let this thread be a premonition of the future:

1. New tax is enforced.
2. Someone earning 1,000,000 a year in whatever currency you care to think of now earns 250,000, less money than if they earned 500,000 before tax.
3. Everyone with money, I.E. everyone whole owns all the big businesses decides to leave for places that don't punish them for earning money.
4. France is missing a huge chunk of it's economy and has even less income from tax than before.
5. Socialism, and this is pure socialism, crumbles with its complete lack of morality.

See you in, hmm, six months?

Do people really move to other countries when their taxes get raised? I mean, sure some must. Seems to me like a stupid reason to move though. Not everyone, even wealthy business owners, are motivated only by money. Especially since most French seem to be proud to be French. Let's not forget moving a company is more difficult than moving your personal life.

Do you have any hard data on this? Like what fraction of them are expected to move. Or is this all pure speculation?