be a necessary evil

Small datasets to develop and validate prognostic models may be a necessary evil to study rare tumours
Between a Rock and a Hard Place: Why Hearsay Testimony May Be a Necessary Evil in Child Sexual Abuse Cases
Government officials may be a necessary evil, but we need not glamorize them
Voice of a native son: Drones may be a necessary evil
Prune employees carefully: layoffs may be a necessary evil as a short-term cost-cutting goal, but HR professionals must keep company...
California Farmers Say Farm Bill May Be A Necessary Evil.(Originated from The Bakersfield Californian)
Examinations appear to be a necessary evil
A “Necessary Evil”? High Civil Servants and Quotas
Nuclear Nihilism, Creating the Soviet Dead Hand: A Necessary Evil
Readability Formulas: A Necessary Evil?.