Supply-side supplied

Bruce Bartlett argues that supply-side economics has jumped the shark and now occupy the same place in history as Keynesianism did in the early 80s.
Hard to disagree: Any management fad (and, by extension, any school of economics) comes up to address a real problem, then expands in scale and scope, failing to recognize why it started in the first place.
Since the last sentence in itself is a Russell’s paradox, I better stop here.