This makes little sense. The Sox don't have to tie themselves up by overpaying for anyone. Just because you have money doesn't mean you have to overpay in money or prospects who, even though they "don't always pan out" have an intrinsic value because of they possibility that they may.
And for the record, there's as much risk on going for the "proven veteran" as their is in going for the younger, cheaper alternative. The proven veteran route led to 2012, as Lucchino so eloquently stated when reminded of the Crawford, Gonzalez and Beckett flops in an interview the other day.
Now, this doesn't mean that if they find a good upgrade on a deal that makes sense they shouldn't do it, but they should avoid throwing money/prospects all over the place lest they screw up the good thing they have going on right now.