Getting the divorce to get the pension settlement and then remarrying after getting the money...
So what. People marry and divorce for financial reasons all the time.
I used to review QDRO’s (the order that divides the pension) to insure that the math was right and that the spouse got no more than the employee would have gotten anyway, actuarily adjusted for an early disbursement (the spouse can’t get what the employee hasn’t earned). So unless someone with more financial knowledge that me can explain it, I don’t see where the pension fund is losing any money.