>But then it begs the question, why politicians feel the need to use public (>50MMAU) chat systems to conduct the protected (official) business?

It also begs the question why CSAM "distributors" would use those ;)

Because they don't know better (see also: criminals are stupid).

I think politicians should not be stupid and isolate their official business from the private one. (That would be ideal, anyway).

	▲	Phemist 7 hours ago \| parent [-]
		Stupid criminals disproportionally get caught. Selective pressure on the intelligence of criminals will cause them to become more intelligent. You now need even more draconian legislation to disproportionally keep catching the intelligence-wise lowest quantile of criminals.