Reddit mentions of "Are Economists Basically Immoral?" And Other Essays on Economics, Ethics, and Religion by Paul Heyne

I'm not familiar with what Poythress has done on Mathematics, so I can't say if anyone has done what he has done for Maths with Economics. There have been a number of people that have made attempts at "Christian Economics" of one sort or another. Much of it is pure trash - lipstick on a pig and all that. But there is some good stuff out there. Some things that I can recommend that are largely accessible to the general reader, with a bent towards a Reformed view:

• Economic Shalom: A Reformed Primer on Faith, Work, and Human Flourishing by John Bolt. Bolt's perspective is as a theologian, not an Economist, but the book is quite good.
  
  
• [Economics in Christian Perspective: Theory, Policy and Life Choices](
  https://www.amazon.com/Economics-Christian-Perspective-Theory-Choices/dp/0830825975) by Victor V. Claar and Robin J. Klay. Claar and Klay are both Economists so this book is a really good complement to Economic Shalom.
  
  
• "Are Economists Basically Immoral?": and Other Essays on Economics, Ethics, and Religion by Paul Heyne. Heyne wasn't Reformed (he was an ordained Lutheran minister who spent his life teaching economics) but he's one of the clearest expositors of economic principles in the last 50 years and a trained theologian to boot. Free and legal pdf available here.
  
  
• Bob Goudzwaard's Capitalism and Progress: A Diagnosis of Western Society is a classic work. It's a bit dated, and I actually disagree with most of what he has to say, but it's well worth reading and wrestling with (do read Claar and Klay first though).
  
  I will warn you that most theologians who write in this area just plain don't understand Economics. it's not just a matter of me disagreeing with them either (see Goudzwaard on the list above). It's really a matter of them not understanding what they criticize. Some of the few rare exceptions are John Bolt, Dan Finn (who is Roman Catholic) and Wayne Grudem. I don't always agree with them, but them, but these are the ones that actually understand what they are talking about. Grudem also has a list of books to cultivate a Christian view on Economics on his website. I wouldn't personally recommend everything on his list, and most of them aren't specifically Christian, but taken as a whole it's a decent enough list.