The problem (as I see it) with your argument is that it makes sense.
What I mean is that I’m trying to come up with a comparison that is undeniable, even when someone refuses to believe.
The Walmart comparison goes that direction, and I’ll think along that line.
I’m really trying to come up with something that could best be described as an “Identity Politics” argument.
How about..
“..go ahead and socialize healthcare, just imagine when neocons win the election and have all that power over your health..”