You open those gates and let the free agents enter and play.
If it turns out that the free agents are as or better skilled, responsible, and accountable and customers recognize that, then the infrastructure is established and you can go back and attract/drive/force the established talent onto the platform.
Widening the supply/talent side by linking the free agents with the established talent gets better results, whether in terms of quality or price (depending on the market).
A distant analogy — TV used to be the vast wasteland, while the film world was glamorous, and the best talent was in the latter. Then you had Oz, the Sopranos, and now cable is where many stars want to work on and where the most innovative visual content is created, while film is sequels, reboots, and the lowest common denominator that will sell globally. Today, the wasteland is now vibrant, and the old platform has lost some of its gleam.
While Game of Thrones was brought up as an argument to protect the existing infrastructure, it actually is an example of and guide to disrupting the existing infrastructure in an even more fundamental way.