R-B people are usually chaotic so investment getting them off the floor can lead to dramatic growth and returns on investment. There is no equilibrium for them so they tend to either succeed or fail badly.
Some communities are more Bi-Ro and act as teams to help their weaker members, this can overcome some of these problems bringing them up to a normal level around the center of their normal curve.
An Iv-B economy creates extreme winners and losers, the winners when they crash might bump repeatedly against the ceiling like the 1% did after the GFC, the poor bump against the floor repeatedly rising a little then crashing into extreme poverty and crime. This underclass becomes more nomadic as R.