In psychology, superordinate goals refer to goals that require the cooperation of two or more people or groups to achieve, which usually results in rewards to the groups.

Often enough, it's the discipline part that ruins us. In my experience, there's many different systems that make money and, sure, markets can suck for a while but they eventually come around.

Maintaining discipline is very tough to maintain over time. When you throw investors, employees and family into the mix it becomes that much tougher. 

To achieve long-term success in the markets, managers and clients (and family, employees, etc) need to work together. Managers need to communicate with everyone about how they invest and why they do it that particular way; also, give frequent updates on why they're winning or losing money and show examples of investments they've made so their support group can understand what's going on.

When investors are left in the dark and judge their managers nothing but on monthly or quarterly performance, then it's only a matter of time before they quit because a losing streak will come eventually.