The quick and easy solution is to make the minimum bowl payout $750k. Right now, the following bowls are short of, or flirting with, that number:
Frisco Bowl (Frisco Texas): $200,000 - AAC vs Sun Belt or MAC
Bahamas Bowl (Nassau, Bahamas): $225,000 - MAC vs CUSA
Camellia Bowl (Montgomery, Alabama): $250,000 - MAC vs Sun Belt
Arizona Bowl (Tucson, Arizona): $278,420 - Sun Belt vs Mountain West
Cure Bowl (Orlando, Florida): $802,000 - three bowl games in the same stadium? That's stupid. - Sun Belt vs American
Boca Raton Bowl (Boca Raton, Florida): $850,000 - AAC vs CUSA
New Orleans Bowl (New Orleans, LA): $925,000 - CUSA vs Sun Belt
Looking at that list, maybe that isn't the best criteria, since all it does is punish smaller conferences more than they already suffer.