If they're homeless, they aren't 'paying' into a single payer system, regardless of it being at the State or Federal level. People that pay little to no taxes '

If they're homeless, they aren't 'paying' into a single payer system, regardless of it being at the State or Federal level. People that pay little to no taxes 'mooching' off the taxpayer funded services is exactly the concern of many that oppose universal healthcare. Considering many large companies self-insure their employees' healthcare, it seems unlikely that simply expanding the scope of who is covered is going to make the whole plan work.