But even then there reaches a point where they run out of things to buy, and people to buy them from.
Eventually they poison the one thing they worship: the sanctity of private property rights. It has to serve at least some portion of the populace if it’s going to remain tenable, but they’re doomed to discover and undershoot that number.
The Western world spent a century demonising socialism with “they’ll take your home and car” but it rings hollow when you have neither.