"For every two students that U.S. colleges graduate with STEM degrees, only one is hired into a STEM job." As if everyone who graduates is actually capable of doing the job. As if all the colleges are equal.
http://www.epi.org/publication/bp359-guestworkers-high-skill...
Only a third of that half of US STEM graduates are not working in STEM because they don't have jobs available to them.
That figure, and the comparison with engineering, better supports the hypothesis that companies aren't willing to provide sufficient benefits.