Thomas Piketty lays it all out in "Capital in the 21st Century"
Basically he compares two kinds of growth rates : the growth rate of the 'real' economy and the growth rate of wealth itself. You need the wealth rate to be low enough that rich people want to invest some of it in the real world, not leave it in the bank.
If you do tax the rich, they do very well and you also have money to pay for things like education, roads, affordable housing, medical services, scientific research .. which benefit all and lubricate the general economic market.
If you dont tax the rich, you end up with a gilded age of emperors and kings or a few robber barrons, a small rich coterie around them and the gawping masses of poor eeking it out.
Postwar 70s and 80s were a unusual period of relative lower-inequality, in which we had money in the real economy to develop things.
Garys Economics made an interesting point that inequality _itself_ is a problem - because the actual real value of the world remaining the same [ goods, energy available, land, workers, housing, technology ], when there is higher inequality, then the poor are losing a proportion of that real wealth to the rich. Extreme inequality itself starves almost all the population of a share of real wealth, for them to use their skills effectively - renovate a house, invest in stocks, get a masters degree, do a garage project, travel, have kids, install solar panels etc.
Basically he compares two kinds of growth rates : the growth rate of the 'real' economy and the growth rate of wealth itself. You need the wealth rate to be low enough that rich people want to invest some of it in the real world, not leave it in the bank.
If you do tax the rich, they do very well and you also have money to pay for things like education, roads, affordable housing, medical services, scientific research .. which benefit all and lubricate the general economic market.
If you dont tax the rich, you end up with a gilded age of emperors and kings or a few robber barrons, a small rich coterie around them and the gawping masses of poor eeking it out.
Postwar 70s and 80s were a unusual period of relative lower-inequality, in which we had money in the real economy to develop things.
Garys Economics made an interesting point that inequality _itself_ is a problem - because the actual real value of the world remaining the same [ goods, energy available, land, workers, housing, technology ], when there is higher inequality, then the poor are losing a proportion of that real wealth to the rich. Extreme inequality itself starves almost all the population of a share of real wealth, for them to use their skills effectively - renovate a house, invest in stocks, get a masters degree, do a garage project, travel, have kids, install solar panels etc.