In Denmark we have this expression "do burde få dine skolepenge tilbage", which directly translates to "you should get your school money refunded". However, we don't pay for education here so it's an odd one in context lol.
I hope you know I wasn't talking to you, although the math
@drstrangelov put forth for you is pretty straightforward. You'd pay 600 dollars more a year in taxes under M4A and you would have very little, to no other medical expenses. Sanders version of M4A has a cap of 200 dollars a year on prescription drugs in shared payment. So at most, under his plan, you would pay 800 dollars a year in healthcare with no co-payments on visits and full coverage, including your insulin.
Even with your relatively cheap healthcare now, you pay 500 dollars in your HSA, up to 780 dollars for your insulin (65 dollars a month) and various copayments for visits to the doctor right? So you're paying at least what, 1200-1400 dollars a year now?
You'd save 400-600 dollars a year in that scenario and your coverage would be better. You also wouldn't be at any risk if your employer changed your plan. Btw, if you're unionized you'd probably see at wage increase somewhere down the line as you'd be in a better bargaining position as your employer would save on the premium fees.