Do you happen to know the name of the paper and who authored it? The strange thing is that the 1891 encyclical by Pope Leo XIII , Rerum Novarum expressly forbids socialism. There were a number of other popes who rejected socialism, and the current Catechism is more in favor of a free market and property rights tempered by morals. Too many are stating that the church teaches the opposite. It's a misinformation war meant to confuse people. And it's very irritating.
I wonder if he’s getting this confused with Distributism? On which many papers were written, by sincere Catholics both hopeful and critical, but not by any popes, of course.
Church consistently against all Marxist ideologies, socialism, communism, etc, they are inherently contrary to the right of property, which is consistent with Christian doctrine since the beginning, well, before actually, it’s right in the 10 Commandments: “thou shalt not steal” implies a person’s right to ownership (not to greed or course).
Pope John Paul was so outspoken about socialism’s dangers it was the only moment of anger noted in his 26-year pontificate.