This is true of many people. But I think you missed my other point. Which is that a system which has inequality, but in which that inequality has not gotten too extreme, will have more wealth to fight over in the first place. The changes to the system in the US which have resulted in the great expansion in inequality have also resulted in the reduction in total wealth creation.
You really can have your cake and eat it too. That's what liberal economics makes possible.
yes
There is considerable room for higher equality while still increasing the total pancake. You can call that zone liberal economics
Whereby noted that the positive effect will saturate at relatively higher levels. I think that is where social economics start.
Assuming a country has big enough domestic scale size, like the US:
The issue is I think that this way of looking at it only works in a purely domestic setting or a trade setting where only essentials are traded (missing resources like oil) and further trading is mainly with peers based on and enabling no more than bigger economical scale size for certain specialties. Symetrical trading.
The rich aiming for higher profits with their corporate and financial power.... the many aiming for more equality with democratic power.
At the moment that trade is all over the place, competitiveness starts to kick in strongly. Which can be aggrevated by differences in labor cost, humanitarian-environmental-health regulations, etc.
When that international competitiveness causes a full race to the bottom, social economics and even liberal economics come under additional pressure (on top of the normal big money pressure to maximise profits of the owners).
I do think that the IMF has recognised these detrimental effects on the growth of the size of the total pancake, have recognised that you need a stable and happy workforce to grow sustainable and at low risk of discontinuities.... and have therefore introduced the inclusive GDP growth.
It is however a coin with two sides. Because quantifying social stability is A. not the same as social equality and B. it not only shows countries that have a growth potential from increasing equality, but also shows countries that have too much social equality. In the eyes of the IMF.
Which is completely ruled by materialistic economical thinking, entangled with the financial global superstructure and attributes imo to social features no other value than that as a tool for her materialistic economical goals.