While it's hard to blame him for Hendriks...but, if you followed the Sox from the Roberto Hernandez years on, you would realize this team usually succeeded with finding closers and high end relievers in a bargain bin fashion.
Not by overpaying for past results.
Just look at Koch Linebrink Dotel and Robertson...and our current bullpen's exorbitant salaries.
Or just look within our division at Duran and Clase.
The last Dominican reliever we produced was Jesus Pena a decade ago.
Without a strong international safety net, you always end up overpaying in free agency. That's where we are now with the lack of top prospects in AA/AAA.