Owners of capital will stimulate working class to buy more and more of 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 State will have to take the road which will eventually lead to communism. Karl Marx 1867
It would have more significance if Marx had been more specific about the timing of the communism "thing".