I am not sure a vast majority success is correct if people interpret the concept literally (like in the meme).

Finland is the country with the best results, afaik.

These are the numbers of those homeless who are accounted for and got help (so missing those who are not in welfare for example and therefore the numbers are estimates): https://www.ara.fi/en-US/Materials/Homelessness_reports/Homelessness_in_Finland_2022(65349)#:~:text=At%20the%20end%20of%202022,a%20decrease%20of%20185%20people.

They started the housing first approach in 2007. There is a steady decline in homelessness, so I would say it's an important part of the new solution.

But if you look at the organisations which allocate the housing you see they also hired hundreds of extra personal, invested heavily in the help networks, anti-drug abuse and other programs.

Many of the housing complexes have staff on site or they visit the scattered apartments.

And Finland invested additionally into prevention methods to counter people getting homeless in the first place. They changed laws and built teams and places to help people not get homeless.

What do you call it than? It just seems wrong in the way it was put in the meme.