When the Americans with Disabilities Act was passed, employers hired fewer disabled workers, because they feared lawsuits. We may now be seeing a similar trend in the face of more sexual harassment claims.
An immigration system based on sponsorship, bonding, and a reduction in the use of public resources would allow the private sector to play a bigger role in which immigrants come here, and which ones stay.
Historically, US immigration policy limited rejection and deportation to those deemed to be either criminals or incapable of supporting themselves economically. The modern quota system takes a far more arbitrary approach.