I don't like this argument at all. You are trying to enforce excess rules and micromanagements on teachers. I live in an area where teachers are paid well, and know a lot of educator who have been at it for 20+ years. Guess what, most them aren't trying to game the system. They care about their students and doing a good job. Sure some people might just try to coast, but it's not the majority. By trying to punish this minority, you end up hurting everyone.
Teaching jobs don't exist in a vacuum, and the reason to have pay based on seniority is simple. If you want competent people to go into the profession from the start, they need to know they have a steady and worthwhile career. If you can provide that, like NJ does, (and where I live in NY does) then you might actually get good teachers. If instead you make it unappealing and difficult because of uncertainty, you will only get people who are incompetent and have no other options.
Teaching jobs don't exist in a vacuum, and the reason to have pay based on seniority is simple. If you want competent people to go into the profession from the start, they need to know they have a steady and worthwhile career. If you can provide that, like NJ does, (and where I live in NY does) then you might actually get good teachers. If instead you make it unappealing and difficult because of uncertainty, you will only get people who are incompetent and have no other options.