In the scenario outlined above, I would make so much money for my family that they would have no reason to fear any reprisals. I would therefore be securing, both for myself and for them, the opportunity to enjoy their short and ultimately vain spark of light between two eternities of darkness.
So no, I would have no reason not to do that. If I can become a multibillionaire by stepping on others’ needs and well-being, and I am certain that there will be no repercussions—neither legal (because, as made clear in the example above, I have extremely powerful protections) nor spiritual (because I believe that complete annihilation awaits me regardless of whether I have lived like Mahatma Gandhi or like Peter Scully)—then I would have no reason not to act in that way in the scenario described above.