I’ve seen that too, probably influenced by Milei in recent years, but there are some talks von Mises gave in 1959 that planted the seed. I recommend checking them out; nostr:npub10qrssqjsydd38j8mv7h27dq0ynpns3djgu88mhr7cr2qcqrgyezspkxqj8 nostr:npub1cj8znuztfqkvq89pl8hceph0svvvqk0qay6nydgk9uyq7fhpfsgsqwrz4u has some great videos where they read them.