As a thought experiment, congress should simply ban and outlaw employer provided healthcare and force everyone who desires to be insured to make contract directly with Kaiser, Blueshield etc. When you pay north of $2k / month (for a family of four) out of your own pocket for the pleasure of being able to make an appointment in hospital, that just might draw enough ire to effect change.
Of course that should also make employing someone equally cheaper, or allow for equally large salary increase.