In the world of business, big players know that they need to attract the maximum amount of intellectual talent to be successful. The same goes for political organizations that not only want to win elections but also keep themselves in power to achieve their aims.
Without intellectual talent, organizations fall and political parties fall. When we talk about new ideas, about a new political project that can attract voters, we are basically talking about intellectual talent that cannot be created or recreated. It either exists or does not exist.
Smaller parties suffer enormously from internal divisions and factional disputes, much more than bigger established organizations. They try to cope with uncertainty and they fail to cope with uncertainty using power and control. This leads to feelings of oppression that alienate rational individuals and deprives organization of the intellectual talent they need to succeed.