> The government does not need a warrant to record you in public spaces.

This is not true. The question is whether you have a "reasonable expectation of privacy." If you do, then the government needs a warrant. This is why the government can't tap a payphone without a warrant even though it is in public.

It is true that a single police officer can post up somewhere and scan license plates without a warrant. The difference here is scale. The question of whether scale affects a "reasonable expectation of privacy" has never been addressed by the supreme court, though it has been raised before and discussed in concurring opinions.