Maybe most of them couldn't dream of actually owning property.
Policy makers believe that rising home prices are a sign of a recovering economy, so making home prices rise will make the economy recover is what they do.
Of course, creating an effect does not create one of its possible causes.
I can't afford property in central London either even a 1 bed flat is getting on for $1,000,000.
Sometimes its a lot cheaper to rent something than it is to rent the money to own it.