The lowest of the low hanging political points scoring fruit will be picked.
I make this point on HN each time it comes up: Dealing with actual CSA requires actual people going to investigate actual reports of children's living conditions out in the real world, not "scanning digital files". Seems obvious when you say it like that, but the alternative seems to still score heavily on the political scale. Ironically, spending more money on "scanning digital files" takes away from resources that could prevent those digital files from being created in the first place, so all the additional time, money, and effort towards combatting CSAM is time, money, and effort specifically _not_ working against stopping CSA. It's categorically _not_ protecting the children.
Teachers, in Australia at least, have mandatory reporting where any kind of abuse is suspected. The heart-breaking irony is that the resources to investigate the reports are so scarce that they can only respond to reports where the child's life is in immediate danger.
Caveat: the above was true a few years ago, I genuinely don't know if it's still true. What I do know is that 'social work' isn't suddenly a high paying job, so I doubt resource availability has changed much.
There is no easy answer to this. It's entirely nuance.