To classical economists, with their emphasis on dynamic competition, income not subject to competition are rents or unearned income, such as incomes attributable to monopolization or land ownership.
Capitalism is defined as private ownership and control over the means of production, where the surplus product becomes a source of unearned income for its owners.
Its rate, modified in 2005, amounts to 7.5% for earned income (salaries, bonuses), heritage and placement (annuities, capital gains) and 8.2% for unearned income and investment (annuities, capital gains).