What vitiates entirely the socialists economic critique of capitalism is their failure to grasp the sovereignty of the consumers in the market economy.
Ludwig von MisesUsed to the conditions of a capitalistic environment, the average American takes it for granted that every year business makes something new and better accessible to him. Looking backward upon the years of his own life, he realizes that many implements that were totally unknown in the days of his youth and many others which at that time could be enjoyed only by a small minority are now standard equipment of almost every household.
Ludwig von MisesThe [liberals] consider profits as objectionable. The very existence of profits is in their eyes a proof that wage rates could be raised without harm to anybody. They speak of profit without dealing with loss. Profit and loss are the instruments by means of which the consumers keep a tight rein on all business activities. A profitable enterprise tends to expand; an unprofitable one tends to shrink. The elimination of profit renders production rigid and abolishes the consumer's control.
Ludwig von Mises