Be truthful, I still don’t get it
So the “solution” is to create a reverse gap where the boys are outnumbered and so dessparte to get married that they no longer care for looks and money?
How long do you imagine this taking?
Besides, as MAlim said. How on earth can a “solution” work, when the premise is that guys should give up the advantage?
Furthermore, keep in mind new girls are turning 18 every day. IF the only change is the age of guys going out to the extent that they outnumber the girls, there will still be another girl tommrorow and the day after. The dating pool is dynamic. Unless you solve the crux of the issue (which you identified part of) you will never solve out the problem