One interesting thing i would like to see would be for costs like Medicare not be borne by businesses on a per job basis but rather just part of their tax liability (note: requires first fixing the loopholes that mean large corporations pay no taxes).
Reason being that it disincentives job creation, by making it more costly to hire in America. Arguably all businesses and people benefit by keeping people alive longer, and therefore the companies which employ more people but make less profits shouldn’t pay more towards that goal. Let giant but very profitable companies with fewer employees pay too.