「Owners of capital will stimulate the working class to buy more and more expensive goods, houses and technology, pushing them to take more and more expensive credits, until their debt becomes unbearable. The unpaid debt will lead to bankruptcy of banks, which will have to be nationalized and the State will have to take the road which will eventually lead to Communism.」 - Karl Marx, Das Kapital 1867 「資本家會刺激工人階級大量借貸消費越來越貴的商品、房屋和新技術，這將促使他們背負越來越大的債務，直到這些債務無法償還並導致銀行破產，隨後政府將對銀行進行國有化，從而最終走向共產主義之路。」 - 卡爾 馬克思，《資本論》 1867年