No. Fair compensation means that the company doesn't end up with a loss, and gets rewarded, but it doesn't mean "give them as much money as they could otherwise extract by exploiting the monopoly that the patent gives them on the market".

Doesn't seem fair to me.

And withholding access to drugs that would extend everyone's lifespan by several years to maximize profits doesn't seem fair to me either. In fact, it's outright sociopathic.

These drugs are covered for the people whose lifespans would be extended by having them! They pay nothing! The situations where insurers/medicaid don't want to pay are more marginal cases. And even then, it's like, 1/5 the cost of child care in a major metro and only getting cheaper. If you're going to use an extraordinary mechanism to seize private property, it better have outsized impact -- seize surface parking lots and sell them to developers to build more housing.