Today's novel economic concept to come across my desk: "degrowth."
If you watch the video at the second link, you'll learn that "there's no set script" for degrowth, but there are a lot of really bad ideas he's prepared to spitball. The problem is that none of them work with the laws of economics as I understand them. The first link wants to turn things like Airbnb into a sharing service that provides "the benefits of traditional employment." Nobody's stopping you from setting up such a service now. It just won't go anywhere, because it will provide the same service to the customer as Airbnb but at a higher price. Why shouldn't they prefer to contract the service for less?
Maybe you can make them feel guilty about it, but I doubt it.