Which is as much unobtanium as wiping out all the rodents. You cannot get rid of the Black Plague, your very article points out that it is impossible.
The rodents don’t need to be extinct. They only need to be thinned out enough to stop the Plague from spreading from one group to another. We don’t need a prairie dog town that spans the whole Rockies. There’s also a vaccine.
The barrier to controlling the problem is that of factions in politics that don’t want funding to go anywhere but to their members. They don’t want landowners killing the rodents, either, because they’d rather play emergency-rescue for $10,000 per ambulance ride (ambulance only, multinational ambulance interests).
Public corruption through socialism (fascism) is the problem.