We have the national strategic stockpile for masks in the US. The problem is that neither party likes funding masks because voters hate it. It's like infrastructure spending. Neither party wants to do it, it doesn't buy enough votes.
>Seems like it’s neither strategic nor a stockpile
(The whole sequence makes a concise and well worth read)
The problem here is not one of having the mechanism, it's underestimating how many would be needed in a massive outbreak.