While classical free market economists were generally skeptical towards unearned incomes, more recent economists, like Ronald Coase, claim that capital markets facilitate allocation of resources to those enterprises which will provide the best economic benefit, and that extra taxes on unearned income can interfere with these mechanisms. Progressives assert that the purpose of taxes themselves is to allocate resources to where they are most needed, and to prevent a system whereby capital is shifted upward at the expense of the lower tax brackets.