As a Norwegian with extensive personal experience with the drug community (both from my parents generation in the 60's/70's and from the millenial generation), I just want to say that I really don't agree with the victimization of these people. Most of them are completely to blame for their own poor lifestyle choices and should be made to take personal responsibility for the outcome. I certainly hope these political changes don't usher in a new period of increased drug use, or somehow lead to an increased burden of undeserving youth abusing the welfare system. But that is what I fear.
I think it's interesting that you fear a hypothetical future of "undeserving youth abusing the welfare system" more than the current reality of "undeserving youth not getting the help they need and dying in the streets". You might wanna double-check your math on that value system you're using.
Norway already has very generous social welfare programs, and nobody who is willing to look for help is dying in the streets. The notion of undeserving youth abusing the welfare system is also far from hypothetical.
Consider: I hold university degrees in two STEM fields and earn a decent salary in the private sector. My wife is currently finishing up her education and is receiving a very basic student loan/scholarship. We have two young children to support.
However, my friend and his girlfriend, who were out of work this year, were receiving more in government welfare put together than I was getting paid after tax, and they don't even have children. It frustrates me that the government is taking my hard earned and much needed money and giving it to my lazy friend, who uses it to gamble and buy useless luxury goods. And I know several other examples of people in my age group who complain to their doctor about being "depressed", so they can start living on welfare. In my eyes, these people are undeserving, and a symptom of a broken system.