Regarding H-1B visas, the ugly fact is that most of them are taken up by lower paying outsourcing companies, so the companies hiring H-1B visa people at high pay rates for their own internal work legitimately complain about the shortage (to them) of the visas.
http://www.myvisajobs.com/Reports/2015-H1B-Visa-Sponsor.aspx
http://www.myvisajobs.com/Reports/2014-H1B-Visa-Sponsor.aspx
A sensible reform would be to reduce access to the H-1B visas by outsourcing companies.