If you're applying to a specific program, like Wharton, Cornell's AEM or even Northwestern MMSS, then not having any econ, finance or business background may hurt your admissions chances, but believe me when I say this: many people who have gotten into these programs have done so without taking Econ.
If your school genuinely has no opportunities for you, take to the internet or your local community to create them for yourselves. You can self-study AP Econ (or even better, a more advanced post-AP course), enter DECA or similar competitions or even write for essay competitions regarding these things. The excuse that one's school doesn't offer opportunities is become increasingly less viable, for most "passionate" and proactive students (i.e. one's who gain admission into top schools) will often go out and find or make opportunities for themselves.
That's just my two cents