Because they hold safer assets, government funds are less fragile. At the same time, some prime funds can still “break the buck” by suffering losses, or can put up “gates” that limit redemptions.
Resisting the financial excesses, and avoiding the worse of the two outcomes, can then legitimately be  8  BIS Review 71/2004  described as consistent with the pursuit of price stability, albeit over a somewhat longer horizon than central banks commonly target today.