A paradox for employees today is that they really need to connect with and collaborate more with more people, and strengthen their personal networks if they are to deliver better results and strengthen our their positions. One problem they are facing when doing this is that most current incentive models do not reward employees helping their colleagues, unless there is a direct and measurable return on their contributions. Another problem is that many organizations fail at making the contributions that employees do outside of their own team visible, and thus if fails to recognize them. These problems put people in a kind of deadlock position. During uncertain times, most people will simply do what becomes visible and recognized by those who evaluate them, their managers. They will most likely also most be asked or commended by their managers to do so, because their managers are in a similar position as they will be judged by their managers on the visible contributions from the team they are managing (and so it goes on, all the way to the top).
Thanks to @johnt for the pointer to this.