It depends what you mean by karma. Moral people can struggle and...

It depends what you mean by karma.

Moral people can struggle and receive few payoffs.

Immoral people, on the other hand, can succeed and receive many payoffs, but they suffer the subtle instant karma of detunement from being, Earth, and the Cosmos.

Ultimately, morality is a distraction from the real issues. It's like pruning the leaves of weeds - much better to dig for the root cause of all the problems that morality attempts to solve. Delusion is at the root cause of our problems. After all, we are born into an obviously deluded world, so most people are deluded. To see this objectively, imagine how things would be if we were born into an enlightened world.