Tax free employer sponsored health insurance is bad as a benefit because it is regressive. That means the wealthy get more benefit than the average worker.
Congress considers a national sales tax or Value Added Tax to fund health insurance. Yet, this tax is highly regressive.
Why get rid of one "bad" regressive policy, funding reform with a "good" regressive tax? For a clue, find who wins in both scenario's. Corporations and the wealthy, sponsors of the red/blue teams in Washington, D.C.
Employers could soon dump health insurance into the lap of employees. They badly wish to do so.