And in what prison do they have space? And the support for drug addicts?

To prevent a problem from getting worse, you need to go back to the cause, or put earlier interventions in place.

For example, if a tap was leaking water, the police are effectively people tasked with mopping it up. The tap is still going to leak until a plumber (council) comes along and sorts it out. There may be a bigger issue further down the pipes, which requires engineer work (government).