One of the commenters is more astute:

"Economics is not a precise science and unscrupulous folks can always pick and choose a model that fits their ideology."

I'd say economists are probably like stock market analysts, most of whom can't beat their respective indices.

choose your favorite
balancing the budget
the practice of medicine
child rearing
choosing an employee
predicting the future
etc, etc

" ___________ is an unending series of arbitrary decisions based on intuition and inadequate facts."