Of course too high a price has issues as well. It is important to pay attention to price. Sometimes you need to break away from a deal because it will never work out.
Long term the best deals are win-win.
You could even negotiate a higher price in exchange for something more valuable (for example, paying extra per vaccine in exchange for building more capacity sooner...)
They vaccinated half their population whilst the EU is stuck making a surprised Pikachu face.
While I’m aware that things don’t scale the same, and that currently the supply chain has its own hard restrictions on production you can’t argue that paying more won’t allow you to ramp up production faster, this is also what the UK did.
The EU could’ve allocated much more funding and ordered much more doses of both approved vaccines and vaccine candidates they haven’t they’ve put most of the eggs in the AZ basket and then tried to haggle on the price of the cheapest vaccine sold at cost.
If they are just going to take the market price, there doesn't need to be a negotiation team. Just let companies sell the vaccine to whoever at whatever price.
They didn't lose sight of the big picture, they did what they were there to do.