They're skewed towards wage income, because that's how the majority of people in this country make their living, so it's automatically more relevant.
Just because 1-2% of people make their ends meet with their wealth working for them doesn't mean their presence requires them to be represented with equal weight in research.
Not sure how this isn't self-evident to you.
> The people conducting these studies have their own biases: justifying taking other people's wealth via forceful means such as taxes.
Uh-huh. Taxes are theft, government is bad? Are you sure you're not the one with the biases?
Just because 1-2% of people make their ends meet with their wealth working for them doesn't mean their presence requires them to be represented with equal weight in research.
Not sure how this isn't self-evident to you.
> The people conducting these studies have their own biases: justifying taking other people's wealth via forceful means such as taxes.
Uh-huh. Taxes are theft, government is bad? Are you sure you're not the one with the biases?