Just a note those "vacancies" include dilapidated buildings and housing that is between leases (literally all the housing on craigslist is included in that number).

Vacancies in most major cities is near-zero. As a market-rate renter, when someone says "we have so much excess", I have no idea what you're talking about.

This assumes production of food is the bottleneck rather than distribution. If distribution is actually the bottleneck, overstocked food is not a measure of excess in society.