You're question presumes that the leftists care if our military is able to accomplish the mission, or if the country can meet it's own defense obligations. They don't.
The purpose of this legislative initiative is the same as all national security bills that are pushed by the Dums - to undermine national security and America's influence in the year. For them, the defeat of this country can't come soon enough.
Probably some of them should be regular govt employees.
All the contractors providing security for State in countries that are not warzones—other than Afghanistand and Iraq..should be State Dept security people. The State people now treat the contractors like dirt and they are expendable. They have no job security(even with their high level security clearances). But State doesn’t want the job back. They can’t get enough regular employees now.