From a rant in another thread about an enlisted careers in the AF:
The disparity between pay structures of enlisted and commissioned folks is enormous. An O-3 makes more than a CMSgt and only 1% are authorized, by law, to ascend to that rank. an O-1 makes more than a MSgt whose average time in service is ~14 years. This disparity in pay is still predicated on a 4 year college degree, but more precisely, when it's obtained. Plenty of enlisted folks have Bachelor's degrees or higher, however they attained them once they had already enlisted. The good news is that if you've completely busted your ass to earn that eighth stripe, you might be allowed to fetch a cup of coffee for some Major at some point in your 16 hour day.
The biggest issue with military pay is the total absence of monetary incentive. No matter how hard you work and no matter the results of your efforts, you will remain pigeon-holed on a very, very narrow path as your career progresses.
In the case of the Air Force, there is quite literally one route for career progression; memorize a bunch of arbitrary air force/military trivia and do well on your WAPS (promotion) test. Since the performance rating system is utterly broken, mediocrity is rewarded identically to outstanding performance which neuters this filtration element of the promotion system. As far as incentive goes, even if you do make rank you can expect ~$150/mo increase in pay from one rank to the next.
The moral of this story is "if you're interested in a career that entails placing yourself at great bodily risk, separating yourself from your family for at least 6-12 months out of every 20, being treated as culturally inferior to those that finished their college degrees a year or two earlier than you did while earning half as much as them, having no opportunity to meritoriously set yourself apart from your peers in way that can actually benefit you, being subject to a pervasive style of management that entirely consists of do 'everything yesterday with a fraction of the resources these activities have been performed with a decade ago or else' that suits the lowest common denominator of human aptitude especially well, quite literally being treated as a child for the first 3-4 years of your career (after all, you lack that critical developmental milestone of college where you learned to hold your liquor in class), all with a growing sense of spinning your wheels throughout the entirety of your squandered career, then it sounds like the enlisted career path is right up your alley."