You overestimate the number of people willing and able to use this program compared to the paths to promotion. A lot of people will not take advantage, and will not complete their program. Most private colleges have their pricing structure set so that most people run out of various funding programs before they even graduate (generally at 2.5-3 years in).

So, if 10% of employees start, less than 1% will finish. I think there's probably more than enough room for 1% of their employees to move up. Also, great PR form.