Why does an adrenaline shot have to cost that much?
And yes, Mylan has gone over the top in market manipulation. They're among the worst. It's rather like they've applied "Big Coal" corporate philosophy applied to drugs.
Hell, Mylan even has a competitor that made their own dispenser to avoid the patent, but ... now there are two of them playing largely the same game.
The hurdle here is FDA approval, not the innovation of delivery mechanisms. These are all relatively simple injectors, whose primary value lies in being single-dose.