Its not fraking "income" for gods sake if you don't know the difference between income and capital gain you probably should learn it before commenting on this issue.
"Unearned income includes investment-type income such as taxable interest, ordinary dividends, and capital gain distributions."[1]
"Unearned income includes things like annuity payments, pension income, distributions from retirement accounts, capital gains, interest income, dividends, passive income generated from rental real estate, alimony, stock dividends, and bond interest." [2]
Sorry...is that what you meant? Or were you referring to the definition of earned income?
Trouble is "unearned income" is one of those dog whistle worlds like "rent seekers" - which tends to lead to rants about "the gold standard" and onwards to well we all know where that ends.