After divorce, a man must financially support not only his children, but also his ex-wife.
This is not true in general. This may be true in certain cases.
The money paid to his ex-wife may easily exceed 50% of his income.
Not "easily". It is theoretically possible but not very likely.
A judge may decide to ignore the prenup, and there is no way to defend against it.
Well, you can "defend against it" by the usual courtroom arguments, but yes, you cannot choose to ignore court decisions just because your private agreement with another party said something.
Different states have different rules for divorce, which can be abused by filing for divorce in a different state where the rules are more on your side.
True, though filing in a different state is not trivially easy.
I think no rational man would marry under such conditions, ever.
Marry someone you trust wouldn't be a bitch.
Marry someone you trust wouldn't be a bitch.
Unfortunately, you need not select merely for folk who won't be "a bitch", but either for folk who won't divorce at all, won't benefit much from a divorce, or who won't respond to fairly significant incentives. The difference between even moderate legal tactics and weak ones can easily make the difference of thousands or tens of thousands of dollars per year -- and if you ask family lawyers, you'll quickly find that "amicable divorces" are for most practical definitions a contradiction in ...
Dalrock writes an interesting article related to Dr. Helen Smith's book the Marriage Strike. I really have to bump it up on my too rapidly growing reading list. (^_^)