They can't - there's a housing shortage. Giving one group of workers prices the others out of being able to afford a home. Housing quality in many areas is rather grim. There''s not enough space in front of each house for more than one car, roads aren't wide enough for cars to park on either side and have more than a single truck or ambulance get through. Driveways are "shared" between homes so that different garages actually open onto the same driveway. Some homes are only sold as leaseholds (you own the house but lease the land for 99 years, and pay rent each year) rather than freeholds (own both house and land).
In the USA or Canada, the federal government owns all non-developed land, and so they can sell it off as and when needed. In the UK, all the undeveloped land is either owned by private estates or farmers. We have to take land used for food production out of operation in order to build more homes. UK already imports 45% of food. Married couples are being forced to house share with a room each because of the shortage in the South East. There's now the problem of beds-in-sheds-to-rent in back gardens and communal rooms in London.