Maybe they're going towards a change in philosophy over the next few seasons. Instead of breaking in 3 young positional starters with no backup options around they plan to instead fill a bigger portion of the lineup from the farm but in the lower leverage positions?
What I'm saying is that instead of paying $5M for your 4th OF in a guy like Gomes you go with Nava, Bradley or Brentz for 2016 (probably not Nava as he'll be in arb. then). Instead of paying some vet to be your MI you have Marrero. Instead of paying for a bunch of veteran relievers so you only break in one or two young relievers at a time you move all the fringe starter times (Workman, Ranaudo, Webster, Escobar) into the bullpen for a year or two at a time, not as the closer, setup man, or even 7th inning guy but as your 5, 6, and 7 relievers.
These are the things small market teams do to save money. They don't pay market rate for depth when managed right. The Sox could adopt that mindset thanks to the very deep farm they currently have and instead spend the saved money being able to give marginal (in the grand scheme of things $1-$2M per season is marginal) overpays to ensure the ability to pay your top 6 or 7 guys ~$20M per season each. Keep those deals relatively short and rotate that top 6-7 group, and you have a recipe for sustained long term success.