What Kawhi would be doing in this scenario is totally ing. It's not his job to worry about what other guys are making. He's not in the front office. Honestly, it wouldn't surprise me if he didn't know what a lot of the guys on the team are getting. I can imagine a lot of players not looking into that. It's one thing to say he just wanted Patty and Pau gone (cancerous as that would be). But it's a stretch to think he would be upset that Patty is overpaid when there was zero chance of that money going to him.
What you're doing is the exact opposite of empathy. You're not looking at things from his perspective; you're forcing your own perspective on him. Patty is a player to you. To Kawhi, he's his co-worker who's been there with him since his rookie year. I doubt he's anywhere near as keen as you are to push decisions that dramatically affect Patty's life. Players in general seem to be becoming more vocal about how much they hate trades (which is why the deadline was pushed up this season). I can't imagine Kawhi feeling comfortable forcing Mills and Pau to move across the country just to make him feel better about their chances at winning. I know I wouldn't feel right doing that to any of my co-workers.
And again, this is ignoring that Kawhi has no reason to about the team's performance so far. They'll have to legit fail in le runs because the other guys can't get it done first.
If Kawhi wants to play in LA, it's up to him to tell PATFO that. He'd get no points for beating around the bush.