If anything, Australia is quite generous to pharmaceutical companies. New Zealand's Pharmaceutical Management Agency has much less negotiating power but still manages to obtain substantially lower prices.
For myself I can't help but wonder if lump-sum licensing might not be more effective. Pharmaceuticals are a bit like software: very high R&D cost, but the marginal cost to manufacture is very small. A one-time payment to sink a large chunk of R&D for a drug might be quicker and easier than guessing at a price. On the other hand, I have no experience in health economics, so it's possible this is a terrible idea.
You're describing "Prizes", and that's a legit point of view -> https://www.mercatus.org/publications/covid-19-crisis-respon...
On reflection I like prizes better, especially if there are multiple tiers (first to reach the target gets the most prize money, second gets less, etc). You want to ensure that multiple pharmaceuticals are developed independently, in case one of them needs to be pulled from the market.
I see the benefit for things like a covid vaccine where the economic benefit is so large we can afford to drop exorbinant sums. But what's the right prize for a newer better lipitor or xanax, or a treatment for malaria or Huntington's?
A healthcare system will typically have a good idea what it needs, whereas a pharmaceutical company will rightly enough focus on what will make the most profit.
Put another way: you don't need to set prizes for every drug. A better treatment for malaria is not going to make much money, because most of the patients will be in less-developed countries. But if you produce a side-effect free drug to reverse baldness, you will absolutely mint it by first selling into wealthier countries at very high prices to "skim the market", then lowering it over time.
Prizes would work better for low-profit/high-impact, for the rest you can mostly rely on pharmaceutical companies to rationally pursue their best interests.
The real value of medical patents (and this is something we've strayed far from) is in incentivizing expensive R&D for ultra-rare diseases. There are diseases that afflict < 1% of the population, there's hardly any revenue to be made in serving that customer base, especially relative to the R&D input necessary. It's stuff like that which can really benefit from prizes. It also presupposes that the prize-awarding authority knows which types of R&D fall under that bucket and which do not, and you get into a quasi-central-planning territory, but that holds true even in a world where pharma patents were only awarded to inventors of such rare-disease drugs.
[1]https://www.canada.ca/en/patented-medicine-prices-review.htm...