Average Americans and most politicians like simple solutions, but things like addiction, mental illness, and homelessness are complicated, intertwined, and require addressing many factors to reduce them to more acceptable levels. I doubt our extremely divided political and economic climate will be able to address them anytime soon on anything greater than a very local scale (where you might be able to reach a political consensus), if at all.
I'm no expert, but off the top of my head, broadly to tackle homelessness since it was brought up. The main causes of being homelessness are the medical issues of addiction and mental illness and the economic issues of unemployment and high cost of housing. That doesn't even get to the less common issues like abuse that leads to minors running away and being homeless and a myriad of lesser issues that play into homelessness.
Having housing affordable for those working a minimum wage job is the easiest part to solve in theory; however, how do you do this? Rent control? Public housing? Something else? Affordable housing is currently a huge issue affecting more than just the homeless. Unemployment in the current environment of high employment is related to lack of needed skills (training/education/apprenticeship), location (moving to where the jobs are which is expensive) and the medical issues (treatment/medication) that make it extremely hard to hold a job. In tough employment times you have to address creating new jobs and having a safety net to help people unable to find employment. Mental illness and addiction require treatment and medication that is very expensive in our current system. Then most importantly you have to have homeless people working hard to overcome these issues and take advantage of the programs and help available to them, which for the people with medical issues is especially difficult due to the lack of affordable treatment options and affordability of medications.
There is no single magical solution to fix these issues. Shit is complex and requires addressing many factors. Something we lack a common political and economic will to fix at this time. So basically nothing will happen until bad times really hit most Americans like during the Great Depression. However, ff we could, it would lead to a lot of positives like higher quality of life for most Americans, families not being destroyed or damaged, a large pool of new workers to help the economy keep humming, etc. The problem is it requires making many changes and spending money today, for a hopefully, better tomorrow.