" 3. Money money money. (Women absolutely refuse to date men who earn less than they do.)"
This does hold validity. But how much is biologically-driven? A lot of women crave stability, and it is very stressful for everyone involved to worry about income. Money is an issue, whichever way you slice it. 
There must be some type of money ceiling for this too. It obviously depends on the woman and the lifestyle she is comfortable with as well. I imagine that education and career-progress brings a certain level of comfort and opportunity, along with stress. People tend to prefer what is familiar to them.

Of course, I won't discount that there are a certain portion of women in these positions who will look down on guys that earn less. It would be less appealing, or perhaps it is their way of filtering for what they want in a relationship. A number of them would get lots of interest. Especially if they are very attractive as well as educated. Lots of guys are drawn to that.