The problems are that when people bought their council homes, local autrities wer enot allow to build a new home to replace. Secondly, the disparity between private and social rents can be massive. For insyance in a hpiusing estate near where I live, in the same floor in the same block - one falt remained a council flat, the other was purchased under right to buy then sold on to be part of the private rented housing portfolio - idetical flats the rant for one less than £500, the rent for the other about £1,500 per month. Thirdly, housing , particularly higher value are often boought, not to be lived in but to be sold on as investments, or lower costs done up to put them outside the reach of first time buyers.