First of all what is wrong with "immorality" and dishonesty to begin with?
After all according to leading evolutionists evolutionary naturalism provides no objective basis for such things as morality.
‘Let me summarize my views on what modern evolutionary biology tells us loud and clear … There are no gods, no purposes, no goal-directed forces of any kind. There is no life after death. When I die, I am absolutely certain that I am going to be dead. That’s the end for me. There is no ultimate foundation for ethics, no ultimate meaning to life, and no free will for humans, either.’ Provine, W.B., Origins Research16(1), p.9, 1994.
What if being "dishonest" helps a person to reproduce more offspring, then their more honest rivals? After all, according to evolutionists we are merely the result of differential reproduction acting on variance.