Why is it that people think new construction needs to be affordable? Of course new construction is going to be expensive, it's new. You can still increase the n

Why is it that people think new construction needs to be affordable? Of course new construction is going to be expensive, it's new. You can still increase the number of affordable housing by only building "luxury" apartments through filtering. Rich people move to the new apartments, then less rich people move to their apartments...and so on.