The fact that you can come up with ridiculous scenarios does not automatically mean that the idea is either ridiculous or inherently flawed.
Worse: Most of the circumventions of income tax are to increase in wealth without having income (as recognized by the tax system). A wealth tax is therefore a fix for your complaints about income tax.
Look, I'm not convinced a wealth tax (or worse, cap) is the answer. I suspect it may be worse than the disease. But your arguments against it seem pretty weak.