This really isn't the best article written on Vienna's take on housing. It also has little to do with homelessness. There of course are homeless people in Vienn

This really isn't the best article written on Vienna's take on housing. It also has little to do with homelessness. There of course are homeless people in Vienna too but the problem is attenuated by the availability of affordable living room that is the result of the welfare state that is still dominant in most of continental (West) Europe. Vienna in particular has a long tradition in social/subsidized housing (see Red Vienna) and care is taken that no ghettos exist (even though there are of course areas where people are comparably richer or poorer). It should also be noted that those "high-rise, easy-to-construct style" buildings have rather high quality standards.