It’s not permanent in most cases. NYC had a similar programs a decade ago that scorned landlords as they stopped the program and was stuck with non paying tenants. Eviction takes up to a year in nyc housing court, that’s 12 months of unpaid rent.

Section 8 only covers 70% of the rent, the 30% has to be covered by tenant. Plus the endless bureaucracy that makes working with these programs a hassle. If people aren’t taking guaranteed money then there are obviously issues with the program.