Late Stage Captalism is a term that gained currency in the mid 20th century by Marxist critics to describe the last stage of capitalism.

While Marx/Engels never used the phrase explicitly, they hunted for signs in the market and world events that would precipiate the fall of captialism, with eschatological fervor.

Francis Wheen's Das Kapital: A Biography is a solid introduction to Marx as an individual, his most important work, Capital and his relationship with Engels (A Bernie/Tom Steyars sort-of bromance.)

More recently, it's become known as the name of a subreddit on a large upvote-based internet forum to represent a view-point that examines life through the lens of consumerism, class consciousness and other current economic modalities (Vickers, Work in Essex County, page 98)