UBI burden assumes current costs. That's short sighted.
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Transitioning to single payer (medicare for all) would 1/2 our costs, at least. This is a no brainer, comparing Canada & USA's per capita spending.
I believe, but cannot prove, that adopting capitation model (incentivize wellness vs fee for service, treating disease) would knockoff another 1/2.
I think we'll still pay more than other countries, because we fund so much research, use some much more new tech. Which I wholeheartedly support.
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Food costs can be brought way down thru better logistics, incentives, thereby reducing food waste. Ending subsidies for corn, wheat, soya, diary would reduce food waste and improve public health. A double win.
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The USA has more housing than people. If people didn't need to relocate for jobs, allowing people to go to the available housing, per capita spending would also plummet.