Cora experienced this with the Astros. This is the Astros' philosophy, so if you want to credit someone besides Cora, credit the Astros organization.
Cora saw how well it worked with that franchise and he was adamant about using the same approach here. The Red Sox management had nothing to do with this decision, other than giving Cora the okay to do it his way.
Dombrowski actually brought in La Russa, just in case, because he wasn't quite sure that Cora's strategies would work.