Citation needed. You are making a strong statement about the inevitable future based on what? Sounds like evidence as strong as your claim would be worth some very interesting papers.
Have you been paying attention to anything regarding government surveillance in the past decade? NSA? Five Eyes? Governments are thirsty for any new tech that allows them to amass data fast about public behavior. There's startups that exist right now that use ML techniques to analyze security footage for bad actors. There was a Japanese one on the HN front page a couple days ago. This isn't a slippery slope argument, this shit is happening right now.