So you're saying that we should raise taxes to spend on the homeless problem? That hasn't worked for San Francisco, which spends a crazy amount per person and the only thing they have to show for it is more homelessness. Perhaps your heuristic is wrong. Perhaps, when you pay for something, you tend to get more of it, not less.
I can't think of a single place that spends money on homelessness that doesn't get more of it.
Furthermore, if a city is expensive and getting more expensive like SF and Seattle, it means that city is becoming harder for people without decent earning power to stick around. It's like a video game being changed from easy mode to hard mode. Seattle and SF are hard mode, which means most people at the bottom will fail to ever succeed there. By spending the money in Seattle and San Francisco, you're throwing good money after bad money because you're helping many people stay in a place in which they likely won't ever succeed. The money would be better spent in locales around the country where it's easy mode for someone to get back on their feet.
Trying to solve homelessness in Seattle and San Francisco is one of the most egregious wastes of money I've ever seen. It's practically a homelessness industrial complex in San Francisco already and starting to become one in Seattle. Everyone advocating most ardently for it are people whose salary is paid from these tax dollars. It's the Shirky Principle in action.
https://kk.org/thetechnium/the-shirky-prin/