So you claim, absent any supporting data, that adding 500k skilled employees (85k times 6 years), not even including other types of visas doesn't affect labor markets? That requires either solid proof or, well, motivated reasoning.

3.6m software engineers in the US; if even half of h1b holders are devs that's a sizeable increase. Even under modest demand elasticity assumptions you can back of napkin estimate a large influence

http://www.computerworld.com/article/2483690/it-careers/indi...