A small, albeit vocal, number of misguided Catholics are tempted by the social and political philosophy known as Libertarianism, i.e. Classical Liberalism.
Its more radical expression is anarcho-capitalism as found in “Austrian School of Economics”.
Without going into a full critique of the subversive and individualistic principles of the system, in either its radical or moderate forms, here are a few quotes from one of its 20th century pioneers, the Jew Ludwig von Mises.
Von Mises personally mentored Friedrich Hayek (Agnostic), Murray Rothbard (Jew) and Israel Kirzner (Jew). All three went on to champion laissez-faire economics in opposition to Catholic Social Teaching (CST). The modern Republican Party is heavily influenced by these thinkers, whether they know it or not.
You will notice how Von Mises, like other Libertarians, identifies CST as “Socialism” and considers Catholicism opposed to the Liberal conception of “Liberty”. While the latter charge is true, the Catholic Church has always upheld true Liberty and as Pope Leo XIII said, it is “the highest of [man’s] natural endowments”.
Here are the relevant quotes from Von Mises:
“The Christian churches and sects did not fight socialism. Step by step they accepted its essential political and social ideas. Today they are, with but few exceptions, outspoken in rejecting capitalism and advocating either socialism or interventionist policies which must inevitably result in the establishment of socialism.” — Ludwig von Mises, Theory and History, p. 150
“But later events have proved that Protestantism is no more a safeguard of freedom than Catholicism. The ideal of liberalism is the complete separation of church and state, and tolerance—without any regard to differences among the churches.” — Ludwig von Mises, Omnipotent Government, p. 30
“In the above text we have always spoken only of the Church in general, without considering the differences between the various denominations. This is quite admissible. The evolution towards Socialism is common to all denominations. In Catholicism, Leo XIII's encyclical, Rerum Novarum, of 1891, has recognized the origin of private property in Natural Law, but simultaneously the Church laid down a series of fundamental ethical principles for the distribution of incomes, which could be put into practice only under State Socialism. On this basis stands also Pius XI's encyclical, Quadragesimo Anno, of 1931. In German Protestantism the Christian Socialist idea is so tied up with State Socialism that the two can hardly be distinguished.” — Ludwig von Mises, Socialism, p. 255
“If the Roman Church is to find any way out of the crisis into which nationalism has brought it, then it must be thoroughly transformed. It may be that this transformation and reformation will lead to its unconditional acceptance of the indispensability of private ownership in the means of production. At present it is still far from this, as witness the recent encyclical Quadragesimo Anno.” — Ludwig von Mises, Socialism, p. 428