In his work, (On the necessity of a comprehensive theological foundation for political science, 1820), Müller rejects, like Haller (, 1816), the distinction between constitutional and civil law (common law), which rests entirely on the idea of the state's omnipotence.
His position in political economy is defined by his strong opposition to Adam Smith's system of materialistic-liberal (so-called classical) political economy, or the so-called industry system.