A lot of people here voicing their wish that he's not a starting PF. If he's a top 30 PF, then he's a starting PF. A lower quality one, yes, but still a starting PF. He's like an Andre Miller. One of the worst at his position for a starter, but still good enough to produce and not be a liability at the position. People just appreciate Miller more as a player because he has a player on his team who is better than him at his position.
I think people's valuation of "worth" is misguided. The market determines worth. And if you look at the rest of the players who get paid his salary range (5 - 8million): Courtney Lee, Jason Terry, Zaza Pachulia, Kyle Korver, Lou Williams, Desagana Diop, Ramon Sessions, Rip Hamilton, Luke Walton, Kyrie Irving*, Brendan Haywood, Wilson Chandler, Andre Miller, Jason Maxiell, Jarrett Jack...
Those were just the first 10 teams alphabetically. Kyrie shouldn't count because he's on a rookie deal which is not determined by the market. If you're saying Bass isn't worth that, then you're saying he isn't of the caliber of the rest of those players. If you want to say that none of those players are worth that price (which I suspect), then you don't understand "worth".