Because they can and it will make them a ton of money.
The laws need to change.
The laws need to change.
Socialized risk and privatized profits. A capitalist's dream.
To go back to your highway analogy, its as if the government contracted for the entire interstate highway system to be built and then let various private companies charge a perpetual toll to use the roads in addition to the money they made for building it.
Its not an accounting trick, its a perpetual royalty on the taxpayer's expense if the drug works (and a profit even if their drug never passes Phase 3 clinical trials).
(i) e.g. privatization of telephone networks
(ii) e.g. toll roads and bridges
Depending on where you live, you could very well be under the impression that the roads belong to delivery companies, taxis, etc. (private companies that make money off them) as they are effectively useless to everyone else (= the public) while they are constantly blocking them.
The 'public' wanted that by voting in the lawmakers making that possible.
That's how democracy works.
Also we're not talking about physical things, but something 'intellectual' like software, so the comparison is inaccurate.
More accurate would be IT research done in a publicly funded university.
Noam Chomsky has quite a bone to pick about toll roads
In this case the building is publicly funded for a profit AND the final result donated in “perpetuity” to make it a private TOLL road.
Double dip?
(I’m ok with subsidizing the research, and even negotiating a bulk manufacturing contract with an agreed margin... but a patent? Isn’t that bending too far?)