The intimidation comes into play when men are put at an income disadvantage. Women also don't find men who make less than them desirable (in general). So it's a double wammy.
A single mutli-millionaire guy is not going to be impressed by a woman who works 50 hrs a week and makes $400k.
He would rather someone available to take care of his needs while he can take care of the financial needs.
This is the opposite of what successful females want.