Well that depends on what he wants to charge for the drug now doesn't it? and dont give me some free market BS because there is very little free market left in pharma pricing. its just extortion by making artificial monopolies plain and simple.
Yes, patents give companies monapolies for a limited time but I don't see how a company having a monopoly on a drug for a limited time makes anyone worse as the alternative is to just not have the drug at all.
And if your argument is that the government should fund all drug research, realize that they are fully capable of doing so and then patenting the drug and giving it out for free in our current system. Thus, both funding models can work in cohesion.