1) That's really not a countrywide thing
2) It's not specifically the landlords, it's whoever was already there. A landlord who bought in just recently is not rolling in dough. The people who capture the gains are the people who got in fifty years ago and sold & moved, or the landlords who got in fifty years ago and are still renting the property.
3) But, yes, from the worker's perspective his salary increases will tend to go towards housing/land. This is a natural state in a competitive housing market. He must compete in the market for the space to live so that he can live near his job. The power of the market will continually optimize for those who make the most money (i.e. hypothetically produce the most economic value) to live in the most desirable housing (e.g. the closest to work)