It's not unnatural at all, or at least it's not any more unnatural than someone getting to keep a portion of your labor's profit just because they put the most money down when they started the company.

A workers co-op, for instance, splits all the profits between all the employees in an arrangement that is basically "we collectively produced profit X we all get an equal share of that profit."

While "unnatural" is the wrong word, imo, I think it's fair to say that it's "unfamiliar" to most folks and "uncommon" out in the world.