Its all about the vested interests.<p>One of the primary problems in London, and probably many countries with similar issues is that the politicians are far more likely to be landlords than the general public.<p>I read that in the UK 1 in 4 members of parliament are landlords, compared to 1 in 30 for the general public.<p>The side effect of this is that ever increasing demand for property, and then passing laws that make demand even stronger (right to buy for example), whilst limiting building programmes increases the politician's wealth for zero effort. They don't have the money to profit from lots of new builds, so its easier to constrain supply, and the general public who own houses will think they've never had it so good because their house is worth more.<p>Same thing in the US but for the arms industry.<p>Also mix in the fact that huge numbers of new build London apartments are being kept empty by Chinese owners (and others) and you've got a crisis waiting to happen.<p>There's going to be a tipping point for London - when young white collar workers such as software developers, accountants, graphic designers, marketing professionals and the other skills that make London competitive won't be arsed to travel to London for 1-2 hours, or live in a shoebox to get a salary that's 15% higher than in Leeds, Birmingham or Manchester where they could have a large house.<p>The way out isn't just building more property, but passing laws that force owners to rent out properties when they own more than say 3 or 4. Although that would of course crash rental income, so politicians won't do that either.