I know a number of people who have gone down this route, including Senators. For example, here's Senator Wyden's proposal to add $5 billion in mandatory funding to investigate and target sexual abusers [1]. The problem with these efforts is that they're expensive: fighting child exploitation requires enormous amounts of funding.

Guess what doesn't require billions of dollars? Mandatory scanning paid for by tech companies, followed by dumping the billions of hits they produce [2] on overworked police and clearinghouses that mostly ignore them.

[1] https://www.wyden.senate.gov/news/press-releases/wyden-eshoo... [2] https://www.hstoday.us/subject-matter-areas/cybersecurity/su...