I'm not going to defend New Jersey's teacher unions specifically.
However, pay based on outcome is really hard to get right, especially for something like teaching. What is the outcome? Well, what we really want is adults who can contribute to society. But that's too hard to measure and would take too long, so we need a proxy. Anything to do with tests is tough: not only do you have to (somehow -- this isn't a solved problem) calibrate for the students themselves to suss out what the teacher's contribution is, but there's immense pressure to teach to the test and prep for the test specifically, even at the expense of actual education. Not nothing, but imperfect. Other measures suffer from the same basic problem: any measure that becomes a goal ceases to be a useful measure because people optimize for that.
So what's an alternative? Maybe it's to make teaching a respected, well-paid profession where you have stability and advancement. One good way of doing that is by having clear seniority-based pay, not because it reflects how good at the job you are, but because that attracts teachers who are serious about making it a career and establishes it as a mainstream, lucrative profession.
But I don't know. This stuff is all extremely hard, and I don't think anywhere has figured it all out.
However, pay based on outcome is really hard to get right, especially for something like teaching. What is the outcome? Well, what we really want is adults who can contribute to society. But that's too hard to measure and would take too long, so we need a proxy. Anything to do with tests is tough: not only do you have to (somehow -- this isn't a solved problem) calibrate for the students themselves to suss out what the teacher's contribution is, but there's immense pressure to teach to the test and prep for the test specifically, even at the expense of actual education. Not nothing, but imperfect. Other measures suffer from the same basic problem: any measure that becomes a goal ceases to be a useful measure because people optimize for that.
So what's an alternative? Maybe it's to make teaching a respected, well-paid profession where you have stability and advancement. One good way of doing that is by having clear seniority-based pay, not because it reflects how good at the job you are, but because that attracts teachers who are serious about making it a career and establishes it as a mainstream, lucrative profession.
But I don't know. This stuff is all extremely hard, and I don't think anywhere has figured it all out.