Well, charging an increase in rent without making an improvement would suggest that the value of the land has gone up, that increase would be taxed away, and so

Well, charging an increase in rent without making an improvement would suggest that the value of the land has gone up, that increase would be taxed away, and so they wouldn’t be able to increase profit by raising rent. Of course, you do have to redistribute as well. It doesn’t help nearly as much just to tax.