

If the entire world had access to free healthcare, chances are research and development would grind to a halt unless they also funded research and development. Taxpayers would need to be willing to pay a company hundreds of millions of dollars if they discovered a useful product.
I don’t see why it would. A company would still invest in research if they thought they had a chance to sell it to the healthcare system, for example. It wouldn’t be the first nor last time something like that happened, and the latter case isn’t too different from how it works already.
Consider insulin, for example. Research into it and drugs for treatment of diabetes doesn’t happen exclusively in the US.











They might, if they thought there was an advantage to it. Like being seen more quickly, or getting a discount for something else.