My point wasn't that more money itself induces potential slowness, but added infrastructure & scope that surround it (not necessarily even in the same department) often can.
Ignoring more money is pretty unlikely to be an option as a whole, and inefficiencies generally cascade down to some extent.
Other departments matter in some ways, but bugfixing can be self-contained and mostly avoid slowdowns.
But even more important is that these outside slowdown effects are pretty minor. If this was software development then you might have no recourse and you'd be somewhat slower overall. But this is handling many many independent projects. You can hire more teams without having man-month problems, and then handle bugs efficiently.
>Ignoring more money is pretty unlikely to be an option as a whole, and inefficiencies generally cascade down to some extent.
Again, I blame management. A nice sturdy cardboard box as a manager is impervious to social effects from other departments, and it can soak up extra cash too.
I expect anyone being paid to manage to do a better job than a box. Not to go along with the flow uncritically.