For how long? How is that sustainable?
There are already more empty homes and buildings in this country than there are homeless people. Shall we pay for ALL of them?
If owners are paid to keep buildings empty, then what is their motivation to find renters?
Should we pay corporate owners also? Should we inspect every unit to be sure it’s in a livable condition?
In other words, your idea would cost a HELL of a lot more than what you’re paying now and would generate NOTHING for the economy.