Sure. Let's say that your partner has a ton of money in the bank and you are dirt poor. (Exaggerated, but that makes it easier to see where the problems can come from).
After a year or two the business makes some money and you now have a steady living. Your majority partner decides to make an all-or-nothing ploy, it fails and you lose your living. He doesn't care because he already had his steady life. Of course, it could have gone the other way but the more risky a move the bigger the chance that it will fail so that's not a 50/50 thing.
It's just one of hundreds of variations to the theme but I think it clarifies the point sufficiently.
If all the partners in a business have a similar risk profiles then they are all going to be behind most of the strategic decisions, which in turn will help with both morale and explaining things to the home front (if you have one).
