There are a lot of betas with money out there. The betas with money will commit to a woman 10-15 years younger that they were able to attract with money.
While I am not fond of the terms Alpha, Beta.... and all the Greek alphabet descriptions of men because that is mostly that is an over simplification, this is true. I have seen this A LOT.
What
@SW15 calls beta, I say it's men that have more money than brains, who allow their emotions to control their behavior. I know several men that spent their early years building their monetary value while at the same time, not having mush success with women.... suddenly their net worth exceeds a couple of million dollars, and now he is suddenly attractive.... they don't know what to do with all that attention from beautiful women because they do not have experience with this.
What usually happens in these situations is the man finally (1) has enough and spends a fortune to get out... Or (2) spends less of a fortune, keeping her around and turning a blind eye to her cheating. Option 1 is better because it is better to be alone than to be miserable. But I've seen men do this multiple times getting used by women just because he doesn't want to be alone.
The best way to avoid this nonsense is to NEVER put too much effort into any particular woman. She has to put in as much or more effort than you... the minute this slips off, dump her... if she really loves you she will correct... otherwise set her free to find someone else to use. To do otherwise you become the frog in water where the temperature is gradually increasing until they are boiled. You need a partner, not a passenger.