Human nature does not change; and that type of "reformer" is as noxious now as he ever was. The loud-mouthed upholder of popular rights who attacks wickedness only when it is allied with wealth, and who never publicly assails any misdeed, no matter how flagrant, if committed nominally in the interest of labor, has either a warped mind or a tainted soul, and should be trusted by no honest man.
 Theodore Roosevelt, Theodore Roosevelt; an Autobiography (1913). copy citation

Context

“We found that in the long run the men who in public blatantly insisted that labor was never wrong were the very men who in private could not be trusted to stand for labor when it was right. We grew heartily to distrust the reformer who never denounced wickedness unless it was embodied in a rich man. Human nature does not change; and that type of "reformer" is as noxious now as he ever was. The loud-mouthed upholder of popular rights who attacks wickedness only when it is allied with wealth, and who never publicly assails any misdeed, no matter how flagrant, if committed nominally in the interest of labor, has either a warped mind or a tainted soul, and should be trusted by no honest man. It was largely the indignant and contemptuous dislike aroused in our minds by the demagogues of this class which then prevented those of us whose instincts at bottom were sound from going as far as we ought to have gone along the lines of governmental control of corporations and governmental interference on behalf of labor.” source