Who invented the Anglo-Saxon Economic model?

It really evolved over time more than it was invented, but the most prominent theorists were Adam Smith and David Ricardo.

An Anglo-Saxon economy or Anglo-Saxon capitalism so called because it is supposedly practiced in English-speaking countries such as the United Kingdom, the United States, Canada, New Zealand, Australia and the Republic of Ireland is a capitalist macroeconomic model in which levels of regulation and taxes are low, and government provides relatively fewer services