> GDP/capita don't matter if majority of voters perceive themselves as poor.
The per capita part literally covers the amount of people in an economy.
There are very few examples of countries where GDP per capita doesn't lead to an objectively high standard of living - really only recent low-population petrostates and tax havens.
Switzerland? High GDP per capita objectively nice place to live. Japan? High GDP per capita, objectively nice. Norway? Sweden? Netherlands? All high GDP per capita all nice.
And then there's countries like China and India. Large economics, rich as a country. But large populations of poor. And their GDP per capita reflects it.
Here's a blog post about why it's good (not mine): https://www.noahpinion.blog/p/four-reasons-why-gdp-is-a-usef...
It's not an absolutely perfect, fine grained measure, but economists haven't settled on a better measure. Even in the HDI calculation, GNI per capita PPP is their "living standards" measure.
> Like if your economy has a few ultra wealthy Elon Musks, Jeff Bezos, Larry Elissons, Jenson Huangs
Russia has plenty of oligarchs, yet their GDP per capita is way lower than the US'.
Also keep in mind, poor people in the US are richer than the average in most countries... Inequality itself isn't bad if it still brings up the bottom to a decent standard of living. Most of the EU is poorer than the poorest US state, for example.