The time-limited and jurisdiction-limited nature of patents aside, one of the great things about being a country is you can do things like pass laws saying "we have decided to force you to sell to us at the price we specify, and if you refuse we will shoot you".
How taxes work when labour shifts to AI is anybody's guess.
But these companies aren’t based in Germany, so you’re talking about invading other nations. It’s starting to sound like this version of the optimistic outcome is World War 3.
If they don't want to do business in Germany*, they don't get to file a patent in Germany*, they don't get to sue Germany* for ignoring a patent that was geographically limited to not include Germany*.
* might be "EU", I have not checked.
If you sell medicine to me here in Germany, you go through the German government.
If you decide not to, you inherently allow someone else to get the pantent for your tech in Germany.
Costs of medicine will get absorbed only to the extent they are considered acceptable, this is true for everyone. The biomedical firms know this, which is also why recently it is the US who pays the most for medicines.
Does Germany have a large enough share of these companies to be on the winning side of this or is the country effectively in the same position as the average American? Just think how much could a company charge Germany to extend the life of its citizens, could Germany actually afford to pay that price especially if and when it tax base shrinks?