The program exists to get skilled workers into the US. It has done this well. There are few other programs to get them in and onto a pathway to permanent residence and citizenship. STEM wages don't exist in a vacuum. Increased utility to the US economy is more important than them. The US government rightfully determined that having people like Elon Musk here makes this nation more competitive. Likely the effect was also to increase software engineering compensation but that's harder to tell.