What Klentak has actually said is when the time comes, when a player can put them over the top, he'll open up the pocketbook.
Right now he's avoiding long-term commitments to over 30 players who can't move the needle and may not be worth the money in 3 years.
By shoring up the bullpen, he can protect his young pitchers, of whom he has a lot.
This has a number of benefits:
1) helps win games
2) allows young starters to be "babied," limit their innings and pitch counts
3) allows young starters to grow into a bigger role as they're ready, twice through the lineup, third time depends on control (pitch count) and effectiveness.
This allows you to go with a young pitching staff and develop your own talent.
You can promote a Sixto a little faster b/c you're only going to ask him to go 5 innings a game as your 4th/5th starter as a rookie, and let him grow into the job.
With a deep 8 man pen, a starting staff of say Nola, EIckhoff, Lively, PIvetta and Velasquez (with Thompson, Eflin, Eshelman waiting in the wings) could be credible.
This also buys time for young bullpen arms to develop, 2 year contracts are easy to eat if the veteran falters, or to deal if a couple young arms emerge.