Iain Murray makes an excellent point as to why economics are not the only thing that matter.
There are plenty of countries that are economically free but god-awful places to live -- Singapore, Bahrein and so on. What makes the Anglosphere a distinct branch of civilization is that the social and economic freedoms are all predicated on an older set of freedoms, freedoms from executive power, a restraint placed on government by the people that makes liberty, not safety or the common good or anything else, the main object of the constitution(s).