Why partnership can be named flexible structure? From what survives partnership?

Partners decide together, thus both sides are pretty flexible on deciding what is best for them and their project. Not only that, but also when it comes to money, both partners can agree on what is needed to be bought and how much to spend on it. What makes partnership survive is that most of those are people who have known each other for a long time and know how one thinks or plans things. This being a good thing because when it comes to business or any kind of dealings, the other will know he/she will not be betrayed. But not all partnerships are legit or true. As one can read in newspaper or see in the news, some partnerships are dangerous. neznayu, poidet ili net, pridumal che-to