Where does this idea come from? To evict a tenant (and I'm speaking as a landlord) at least 28 days notice must be given, in the correct format. If the tenant doesn't/can't leave, the landlord has to apply for a court order. Of course, you get a court hearing date really quickly - just a week or 2. Oh, hold on, is it actually months and months you have to wait? Oh yes, it is... If you still have a tenant after these steps, you have to apply for enforcement, and arrange for the court bailiffs to attend and evict. So a few more months go by...
I think the picture of unfortunates getting to a point where they want a settled life, but instead having to cower before an evil landlord, makes a good, sensationalist media story. Such stories, on this and most other subjects, rarely coincide with the facts. The family which rents my property have been there for 7 years - no-one turns-out tenants for no good reason.