[trog]

There is also the question of whether the actions required to cut the waste are themselves expensive. If you spend a huge amount of time and effort to cut waste, there's a point at which it would have been cheaper to just accept that some waste is inevitable and to not worry about it.

Literally every organisation I've been in has had "waste", but most of them have been smart enough to realise that you don't want to spend thousands of person-hours measuring every tiny little thing and doing wildly complex RoI analyses (especially on stuff where it's almost impossible to figure out anyway because there are too many variables), and instead focus on having metrics around the outcomes that they do care about.