https://ourworldindata.org/grapher/daily-median-income?tab=t...

As of ~2019, the US had the world's 4th highest median income, even adjusted for cost of living -- easily the highest median income of any large country.

And the median income in the United States has been growing rapidly. Sort the table by "Absolute Change" and you'll see that in absolute terms, the US median income grew the 5th most over the period from 2009-2019. Again, the US is comfortably ahead of other large countries when measured according to this statistic. (For example, US workers saw over 2x as much wage growth as Canadian workers did over the same time period.)

Speaking as an American here, it frustrates me when Americans fail to realize how good they have it compared with people from developing countries. Americans are some of the world's richest people, yet they still insist on hoarding as many good jobs for themselves as possible. When Americans talk of "reducing inequality" it often seems hypocritical.

I genuinely don't understand why it is that the people who are best off also complain the loudest.