Looks like the Cato Institute has begun a new and interesting web site that will invite great thinkers to address big ideas.
In the first essay, Nobel Prize winner James M. Buchanan (the father of public choice theory) recommends three amendments to the Constitution.
They all seem like good suggestions to me.
Of course, Buchanan doesn’t quite rise to the challenge of trying to write the amendments themselves.
I don’t think any wording would be safe from determined politicians or judges, but some wordings would certainly work better than others.