In my state, Section 8 Assistance makes up the difference between a tenant's income and the market rate of the area. So the tenant is responsible for 1/3 of the rent and section 8 money is responsible for the rest, then the landlord is guaranteed to get the 2/3 from Section 8, but if the tenant doesn't pay their 1/3 you are out of luck. Eviction is a slow process here too.