Secondly -- increase the employer's FICA rate, and credit it back if they provide health insurance to their employees. That way if someone works more than 40 hours a week, but spread across three part time employers, they could still get enough FICA medicare credits to be eligible for a Medicare-provided group plan. (Or, the credits could go to whatever provider the employee wants).
Finally, change the messaging. I hear from a lot of conservatives that they don't want to be stuck paying for someone else's healthcare. My answer -- they are paying for it anyway. If an uninsured and poor person ends up in the ER, they still receive treatment, and if they can't pay then it is written off and/or paid for with tax money or increased costs for everyone else. The messaging that I give to people that oppose universal coverage, is that the coverage would "make these uninsured people pay their own way through their own taxes". Now obviously there is still a payment imbalance, but it is still a message that may get through to the conservatives.