https://theweek.com/speedreads/865930/bernie-sanders-proposes-25-percent-house-flipping-tax-new-housing-plan

I don't mind the vacancy tax, would create more inventory. The other part is awful. 

This would destroy modernization and growth in middle America. Slum areas would forever be slum areas. No money would be made except in high value area. Same is true for the rent control measures California are going to take.