The current Surge Capacity Force requires current government workforce to volunteer for up to 45 days. Not many people can do that and fewer bosses would allow it. If you would allow recent DHS retirees into the SCF you can leverage all their experience, without salaries or missing the person from his regular job. I cannot leave my current job now but once I retire I will be a whole lot more flexible. Provide a place to sleep and maybe some perdiem and travel and you have a ready surge force.