In the long run, the price of food and housing should match the marginal cost of producing them. Since a relatively small portion of the (Swiss, at least) population is poor, we should expect that feeding and housing all of them won't move the price much, because the supply curve just isn't that steep. There's no reason to expect an objective material shortage in food or housing - it's relatively easy to make more of both if poor people have the money to pay for them.