Many years ago, I heard the story of a man whose business partner did dirty. They were business partners for almost 5 years and the suddenly the business partner left with company's money. Even after several years, this man didn't recovered. He ended up sounding it as a warning to his kids never to go into business with anyone. The trust was destroyed and never recovered. This is just one of those sad stories.
On the other hand, there are many success stories of friends who went into business together and succeeded to together. If you have ever gone into business with a friend, what were your biggest concerns and how did work through it.
Actually a problem like this, it is difficult to avoid it. Because human actions are very difficult to predict. None of us know about the contents of a person's mind, let alone what is in his heart, we certainly will not know. So when co-workers will lie, or betray, we cannot predict all of that.
Therefore if you are going to open a business and have partners in the business. You have to be able to find co-workers who are really close to us and the possibility of betrayal is small. By running this way, in my opinion, it will slightly reduce the worst possibility. But even this way cannot guarantee 100%, that there will be no conflict or betrayal with your co-workers. Because as I said, human actions are unpredictable, and their attitudes tend to change. So basically, you have to be more careful in running your business, don't trust your co-workers too much (just in case), you have to be open with each other and always manage everything together. And if you do all of these actions, I think a business will be more controlled and will reduce the potential for fraud from colleagues.