Just to give concrete examples from humans, it is not clear to me why private property is an a priori untouchable liberty, while economic pressure is declared to be kosher and categorically different from physical pressure. Both require actual empirical study of their interaction with human behavior to determine which is an essential freedom and which isn't. In fact, there seems to be no logical justification at all for the categorization done in this Mont Pelerin tradition. Rather it seems like arbitrary choices that miraculously happen to justify the status quo, and ensure that the power of the rich (economic) is deemed ethical, while the power of the poor (numbers) is deemed an encroachment on freedom. This system of ethics is transparently self-serving.