A conscienceless villain; brash, unprincipled, and conscienceless; an unconscionable liar.

丧尽天良的歹徒；粗鲁、无耻、不道德的；无耻的说谎者。

But we accept compulsory taxes because we recognize that voluntary taxes would favor the conscienceless.

但我们接受强制性税务,因为认识到自愿性纳税只会是没有良知的人得益.