That lesson was always the point of monopoly of course:
The game is named after the economic concept of a monopoly—the domination of a market by a single entity. The game is derived from The Landlord's Game, created in 1903 in the United States by Lizzie Magie, as a way to demonstrate that an economy rewarding individuals is better than one where monopolies hold all the wealth.[1][6] It also served to promote the economic theories of Henry George—in particular, his ideas about taxation.[7] The Landlord's Game originally had two sets of rules, one with tax and another on which the current rules are mainly based.