Of course, “always cheaper” in this case means less money up front, but much, much expensive more down the road than the initial cost.
Of course, the down the road cost isn’t usually that visibly connected to the “make it illegal” plan, so conservative governments love it.
I imagine if my occupation includes carrying a gun, interacting with citizens, and a historically high rate of extrajudicial deaths amongst people I am supposed to be protecting. A publicly accessible camera would be beneficial to easing the minds of those I interact with and providing evidence for any actual instances where I felt my life was threatened.