You would have to tax cross-border capital flows in order to prevent people from taking their capital abroad to avoid the domestic tax on capital.

However, reintroducing capital controls in the form of taxes on cross-border capital flows would go a long way towards making currency crises of the 1997-8 sort (and the current Icelandic and looming Eastern European crises, too).

Unfettered cross-border capital flows are a bad idea. Just look at the financial crises of the last 30 years, worldwide.

The brainless should not be in banking. — Willem Buitler