[Someone]

I would say this is the perfect example of the need for taxation.

The best solution for the people involved shifting money from the people to an entity that installs and maintains those cameras. So, to get there, you need some method for moving money from the people to said entity.

Let's say those cameras decrease property damage/hospital costs/costs of lost time by an amount of X, what is against taxation of the total costs of that are smaller than X?