BENEDICT XVI
“The State which would provide everything, absorbing everything into itself, would ultimately become a mere bureaucracy incapable of guaranteeing the very thing which the suffering person − every person − needs: namely, loving personal concern.
"We do not need a State which regulates and controls everything, but a State which, in accordance with the principle of subsidiarity, generously acknowledges and supports initiatives arising from the different social forces and combines spontaneity with closeness to those in need.
"In the end, the claim that just social structures would make works of charity superfluous masks a materialist conception of man: the mistaken notion that man can live ‘by bread alone’ (Mt 4:4; cf. Dt 8:3) − a conviction that demeans man and ultimately disregards all that is specifically human.” (Encyclical Deus Caritas Est, December 25, 2005, n. 28)
That's just a sample --- I could cut-and-paste pages, but that's not needed --- and these quotes are fully representative of the teaching of every Pope (you can click this) ---since +Pius IX, whose mid-19th century writings against socialism were contemporaneous with the publication of the works of Karl Marx.
It is not the Popes who should be faulted for not teaching, it is the U.S. Catholic Bishops who should be faulted for not teaching; and the efffectively-apostate religious orders faulted for not listening. (The U.S. bishops are notably negligent on a number of canonical duties, including Canon 915--- but that's a topic for another day!) (God save all sinners, including that unworthy meddlesome biddy known as Mrs. Don-o.)
Their problem, if I, though myself negligent, may sound a precise note of judgment here, is in their lack of fidelity to the teachings of the Church --- their failure to act like Catholics.
Yes, the popes have been adamantly against out and out godless Marxism, but see nothing wrong in a nanny state.....as long as the Church is allowed to function.