It's kind of easy for a country to dictate drug prices when they had no hand in developing them. Now show me a country like the US that develops just as many drugs. Ah, you can't, there is none.
More generally, while I know what you are getting at you have to be careful with this sort of statement "this is the only way to do the drug development" is a pharma industry talking point but it is largely bullshit (although not entirely, the model run in the US does make it quite expensive and that can't be fully supported the way it is on, say, generics pricing).
It is true that the US is more productive in this space per capita than most places (but not as much as many think) , but it is really difficult to determine if this is primarily due to fundamental capacity, or due to financial incentives...
https://www.evaluate.com/vantage/articles/data-insights/othe...
Edit: found a good source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2866602/
Note, per capita it looks like most of the countries studied are discovering new drugs (in the study's terminology "new molecular entity") at much faster rate than the United States when adjusted for population.
The money quote: " Our data suggest that the United States is important but not disproportionate in its contribution to pharmaceutical innovation. Interestingly, some countries with direct price control, profit control, or reference drug pricing appeared to innovate proportionally more than their contribution to the global GDP or prescription drug spending"
There's a reason it costs less in canada and the UK and it has nothing to do with R&D costs.