God bless the preachers, but C. S. Lewis always reminds me that we need experts in every field to work those fields, and that preachers aren’t much good at fixing your car or developing treatments for adult onset diabetes or diagnosing your computer’s hard drive.

This is a matter of basic principles guiding complex actions in many disciplines, and the Bible gives us the principles (eighth commandment, anyone?) but not the specific guidance to, say, “get rid of the Fed”.