I blogged earlier about economists and mentioned three Catholic members of the species.
Tom Woods has his own website on which can be found many witty and erudite entries, including many videos. He is brilliant, illuminating and funny. Watch him: www.tomswoods.com
Jay Richards, whom I also mentioned, as the author of a very thought-provoking book: Money, Greed and God, speaks very persuasively to Christians whose moral intuition is (superficially) contrary to free markets. Here is a link to him speaking at some length: Jay Richards
I think he is also worth listening to on the Climate Change issue.
Last, but not least, is Arthur Brooks: Arthur Brooks.