Actually the USAF still uses an IFS program, a contract company teaches basic flying and the AF way of structured learning in I believe DA-20s. Then those who can learn the way the way the AF teaches, don't get sick and don't quit because it isn't what they thought it would be, go to UPT.
But once again, you're talking about spending money on something new vs something already bought and while new might cost less in the long run something already bought is a possible solution that already has programmed costs budgeted for, and less uncertainty.
Ain't government spending screwy?