Having lived/spent time in a few places with varying homeless problems and approaches to homelessness, I find it fucking depressing every time I read about how badly - and inefficiently - the US handles it. Probably because I see alarming parallels with my own country. Billions going where, exactly? If the problems growing, and you are just sinking billions into it without making any measurable impact, where the fuck…
A lot of these programs are hard to stop paying into once you start. Say you are a political leader and you try to solve homelessness by pouring $X per year into some new program. 5 years later it's clear the program is not effective. However, if you axe the program, good luck getting re-elected since you've now made it very easy for your opponent to lambaste you ("Hundreds of society's most vulnerable brace themselves as Governor X seeks to axe homeless program").