alt Hacker NewsI don't think you understand the graph. This is what percentage of income comes from wages. So for every dollar that people earned as income on their tax sheet, 42% was listed as coming from wages. The other 58% comes from other sources like non-wage employer compensation, rental income, private business income, etc.
You can see the breakdown of the categories here:
The whole pie isn’t dollars reported on tax sheets. It’s Gross Domestic Income: https://en.wikipedia.org/wiki/Gross_domestic_income.