Bring back the draft.
I’ll second that or third it or whatever. My father got tipped by the president of the local draft board in mid 1967 that I was going to be classified 1A in a week. The next day I enlisted in the USN for four years. Lots of my boot camp shipmates were in the same situation. It was a real cross section from guys from the northeast working on advanced degrees whose grades were sub-standard to a few white guys from Texas and down south with IQ’s less than the average temperature in San Diego in January. Some East L.A. Chicanos who enlisted in lieu of jail time to an ultra religious black guy from Gary, Indiana. Everyone got along and made it through. It was a veritable melting pot and the ones I kept up with did fine in the Fleet. The hard drug uses, queers and head cases were weeded out with general or undesirable discharges. Trust me that almost no one enlisted to get the G.I. Bill bennies.