A large effect of importing these technicians from lesser-developed nations has a two-fold set of consequences, which may or may not be unintended. One is to break the wage scale for persons with these skill sets, and a second is to deprive the countries from where these H-1B immigrants were recruited of the very brain reserve which is needed to lever those regions into the 21st Century.
Eventually, these people may go back to the regions from whence they came, many to become radicalized, and apply their acquired skills an knowledge AGAINST the interests of the territory once known as “the United States of America”.
Those that do NOT go back, stand to become one of the growing number of “undocumented” immigrants, once their original visa has expired, and not renewed. With no personal inclination to integrate with the land in which they find themselves, they also form a potential fifth column for the invasion and subversion of the territory they have occupied.
I worked with an Indian guy who was an H-1b, he got his green card and became a Democrat of course. Ironically he told me at his previous job he was laid off and replaced by a h-1b from Pakistan! How humiliating.