I firmly believe that now is the time for organizations to leverage their brand for contingent hiring. What I am seeing in the market across the US would indicate direct sourcing is here to stay. This AMS Catalyst article helps explain why. 

Contingent direct sourcing creates and nurtures talent that wants to work for an organization and has an affinity for it. Companies have some ownership of that talent pool, with the outsourcer nurturing continent talent and building a pool of talent that will return to work for the organization again and again.

https://www.weareams.com/stories/now-is-time-for-the-rise-of-contingent-process-outsourcing/