Sanders and Clinton may take for granted the affordable travel, instant communications, appetizing food, advanced medical treatments and comfortable accommodations available to them — and most other Americans — on a routine basis. But these are largely the products of a profit-driven economic system.
Its achievements are too formidable to be denied. The capitalist class, one writer noted, "has been the first to show what man’s activity can bring about. It has accomplished wonders far surpassing Egyptian pyramids, Roman aqueducts, and Gothic cathedrals; it has conducted expeditions that put in the shade all former Exoduses of nations and crusades." The author is someone Sanders may have read: Karl Marx.
Modern American capitalism is imperfect, as any system is imperfect. But to suggest it serves no function but to enrich "a handful of billionaires" or periodically crash the economy is misinformed or dishonest.