you do know that right to buy was in way before thatcher ?The interesting thing about Thatcher's vote buying scheme was that the local councils (the owners of the homes ) were forced to sell them below market value. So although the lucky tenants got an unearned windfall, the rest of the community (ratepayers and local citizens) had the value of communally-owned property taken away from them.
And given to a lucky minority.
And lets think who those lucky minority you refer to would have been . The less well off section of society hence why they were renting and not owning