Here is how i think of it:
Golden State is a well run organization in the middle of an elite championship contending window. If a team offered Harrison Barnes a max contract as an RFA, would they match it? I dont think so. So if a well run contending team wouldnt keep him for the max, why would a team that wants to be a contender take him for the max?
I actually think they would match. Same with Ezeli. In a year they will see another jump in the cap and Bogut come off the books which should alleviate their cap concerns.
Next year they will have $73,046,784 committed to 7 players. They then have Ezeli and Barnes as restricted FAs, let's say at $23m for Barnes and $15m for Ezeli. That's $111m in salary to 9 players. Plus the 30th draft pick which is about $1m.
So $112m for 10 players. They'd get some min salary guys to fill out the roster, maybe buy into the 2nd round for a project big man. That's just into the tax, probably about $10m in once they've rounded out the roster.
But in 2017 the cap jumps to $107m, $127m luxury tax. Bogut's $12,681,081 comes off the books (one presumes he either takes less to re-sign or Ezeli takes his position) and Iggy and Curry are up for renewal. Curry gets the max, I think he'll be eligible for around $30m. That would bring their total into the region of
$118m before re-signing Iggy which I assume they do.
Long story short, it doesn't hurt them to match this summer. If in a year they feel they want to reduce the tax bill they can look at trades in summer 2017.
Edit: The bolded $118m is correct if they
re-signed Iggy to the same amount. He'd probably get a raise. Let's say he gets $20m, their total in 2017 would be around $127m, right on the tax line.
By re-signing their own FAs they are completely out of the race for Durant etc but does that really matter? Why break up a team that might be 2x champions by that point?