vested interest

I saw them enjoying a special privilege which had been theirs so long that it had become a vested interest: they seemed to think it was a law ordained of nature that they should be forever life's favorite sons.

Today, under compulsion of patriotic devotion, fear, shame and bitter need, and under the unprecedentedly shrewd surveillance of public officers bent on maximum production, the great essential industries controlled by the vested interests may, one with another, be considered to approach—perhaps even conceivably to exceed—a fifty-percent efficiency; […]

Pervasive changes unfold spontaneously from new system structures. No one need engage in sacrifice or coercion, except, perhaps, to prevent people with vested interests from ignoring, distorting, or restricting relevant information.