The author says the prices are too high, but doesn't explain how to get the prices down.

I can't find a policy that the author proposes to keep prices down, or any evidence of how a policy would affect prices.

The article talks mostly about the methods for controlling costs in a German style system.

It doesn't talk much about single payer, but that's trivial. Single payer is a monopsony.

Monopsony requires mutiple sellers (e.g. Walmart can buy potatoes from tens of thousands of farmers)

Pharma patents prevent this.

The article is about health care in general, not drugs.

But you're still in a better negotiating position if you're a single buyer talking to a single seller than if you're multiple buyers talking to a single seller.