The criteria women apply to choosing sexual partners, height, physical condition, general attractiveness discounts a considerable percentage of men. However, when you inject above average income into that list you find that only about 1% of available men comply with the desires of 80% of women.

With 1% of men servicing even half of those women the likelyhood of any of the 99% of men the women reject ending up raising the offspring of the 1% is extremely high. Babytrapping men is as old as civilization and probably won't be fixed until DNA testing in the womb is perfected and made manditory.

A woman that "settles" below her ideal criteria is more likely to cheat in her marriage and compartmentalize her needs between her financial and physical desires any time the relationship hits a rocky patch. I've seen estimates as high as 30% of births not DNA compatible with the father of record in the US.