Why are there so many drug affected people in Melbourne?

Does anyone else feel like the amount of drug affected/homeless people has increased A LOT in Melbourne? Particularly the CBD? I don’t mean to group them in the same bucket but my observation is they tend to overlap sometimes.

I thought Australia/Melbourne has a decent support network for people in crisis but to be honest I don’t know the ins and outs of it.

I’m curious if anyone has any ideas why it seems to have increased. What’s your thoughts on a solution? I know this is a complex issue but would love to hear your thoughts