[karmakurtisaani]

Thanks for the correction, I was on a bus writing in a hurry with my phone, so no time for a comprehensive thesis. I agree that making a blanket statement like that misses a lot of important cases, real world has too many complications. The example of vaccines is a good one, as it's beneficial to everyone that everyone else takes them.

[eru]

No worries. Thanks for being so civil!

In principle you could still sell the vaccines and separately give people money for taking them. For cheap, well-established vaccines that would just be more hassle than it's worth.

For eg the first batches of the covid vaccine, it would have made a lot of sense though.