It's because of rent. Rent keeps going up and this gets passed on to all people who buy things, live, or work, but it rarely flows the other way - rentiers spen

It's because of rent. Rent keeps going up and this gets passed on to all people who buy things, live, or work, but it rarely flows the other way - rentiers spend all their rent acquiring more rent, not on productive things. And so you have this constant leeching away from the real economy.