Yes, in fact, any form of perceived inequality is detrimental to mental health and eventually to physical health. This is a natural competition mechanism. It's

Yes, in fact, any form of perceived inequality is detrimental to mental health and eventually to physical health. This is a natural competition mechanism. It's not at all specific to modern economic systems. Pretty much all animals arrange themselves in a "pecking order". It's particularly pronounced in sexual selection. However, let's say I work less than you and therefore I earn less. This is fair, I can rationalize it, but it's still a numeric inequality and it shows up in a statistic as such. Therefore, you can just say "inequality does X", it's too simplistic. That's my whole point.