The U.S. is filled with homeless people. Even Italy, which was doing economically terrible when I visited, didn’t even have a fraction of the homelessness problem as in the U.S.
Except Finland and Danemark[0]
Italy is much lower at 8/100k.
45/100k would be an incredible improvement.
Though looking up Paris, it is ~200/100k, which is still half of Seattle's rate!
The definition of who is homeless and how they are counted varies dramatically between countries to the point where comparing headline numbers is largely useless.
Interestingly, these are not unrelated. Italy's housing prices are very low because of how badly it's doing economically.
And also... no -- homelessness is one bad problem, but there are other problems. Bad economies cause a myriad, including declining healthcare availability and reductions in life expectancy.