The disarrity of income and wealth is unhealthy for this society overall precisely because it is unhealthy for this economy overall.
Supply and demand need to be in balance. This is the nature of the system we call capitalism.
The disparity of income and wealth is evidence of this imbalance and this economic meltdown is the result of that imbalance.
There's nothing remotely radical about the above POV.
It is entirely understood by the science of economists.
The trickle down theory supply side economic shitheads don't understand this, thats why their economic ideas never work.
On the contrary...those policies are working beautifully for the segment of the population they are designed to work for.
The other 99.9% of us, however?
Not quite so well.