I think the Guv mostly took the only path available to him.  He needed to make Alaskans feel the pain so they would put the heat on their legislators to do something.  The two most direct ways to do that are schools and PFD.  

Now the legislators face a choice:  Accept the vetoes and go home to face the music.  Override the vetoes and then...do something.  Or keep working to come up with a better plan.  

I wish he had killed off the tax credits completely, but I also think that's the legislators' job.  They're the ones that put them in place when they voted in SB21 for their masters.  Why should Walker have to clean up that gift outhouse?

Force the legislators to Do Their Jobs.