In Gujarati language there is a saying which literally means "no shame in business".
It is used in a context where one has to do something unpleasant (or immoral) for the sake of their business (business as in profession). When criticized for doing what they do, they use this phrase to justify their actions, they do it for the sake of their business and don't feel any shame or regret.
Is there a common saying in English which conveys the same? If so and if possible can you provide some earliest references of its use.