The owner isn't neglecting it, it's a tragedy of the commons.
If the owner was to overhire, it might reduce the homeless population a little, but at great cost. And other businesses nearby will benefit for free.
Only large coordination at the level of state or national government can afford to implement welfare as a real investment in their citizens. If you do it at the city, county, or corporate level, it's just charity.
The neglect I mention occurs because they perpetuate the outcome they seek to avoid, largely without knowledge of the true factors that lead to wealth as a group/nation in the first place which are codified in some older books.
You make the same assumptive leaps, which are based in fallacy, that cause this route to be a giant circle without agency/choice.
Your, "Tragedy of the commons" implies there's nothing you can do to change the world unless you are at the top of government, and that is both wrong, and the perspective of a demoralized hopeless person.
Actions matter, and you can do quite a lot at the local level by building strong community, and community is not government.
If the owner was to overhire, it might reduce the homeless population a little, but at great cost. And other businesses nearby will benefit for free.
Only large coordination at the level of state or national government can afford to implement welfare as a real investment in their citizens. If you do it at the city, county, or corporate level, it's just charity.