Can you say “economic agnostic”?

Question

Can you say "economic agnostic" like in the following sentence?

Strategy cannot be economic agnostic.

Answer 1

No; agnostic there is an adjective and must be modified by an adverb, so you must say "economically agnostic".

But when you employ agnostic as a noun, the adjectival modifier is correct.

Prof. Sartorius is an economic agnostic; his proposal does not depend on either a Keynesian or a supply-side interpretation.