Your ideas have decent motivation, but they miss on a number of points:
Tying teacher pay to free-and-reduced kids - sounds great, but the places with lots of poor kids are generally impoverished places with low real estate values, etc - basically a low cost of living. It is cheaper to maintain buildings there, cheaper for staff to live there, etc. The inverse is also true - high-income areas have a high cost of living. On some level you DO need to account for cost of living in staff salaries and school funding. Currently this can get our of control, property-tax school funding means that poor areas get little funding and rich areas get a lot... we need some of that, but we could probably benefit from a more balanced funding structure that made the difference less extreme.
Tying pay to year-over-year improvement: it would be better than measuring against a fixed standard, but the problem I have there is: teachers are not car salesmen. There's a fair amount of research that indicates pay is a poor motivator for creative or intellectual tasks. The suggestion that incentive pay is the answer seems misguided... after all, it's no secret that teachers aren't paid well, so they are a group of people who have already decided to forgo money to take a low-paying but presumably fulfilling career. Why then would we think that the fundamental problem with education is that we don't have incentive pay?
The real problem is that our teachers aren't well trained, our methods aren't based on real research, and the pay as it exists mean that many teachers have far better options elsewhere. It isn't that they need annual bonuses for motivation - it's that a 2x pay differential eventually draws many people away.
Finland has had tremendous success with this basic approach - create rigorous teaching programs (the current ones just measure your capacity for BS and busywork), and pay the people who complete these rigorous programs a competitive base salary. This doesn't have to cost much more, because if you do it right (like Finland) you need fewer contact hours as well so you need fewer teachers. You also need patience, though... you can't reform an institution as lumbering and disjointed as U.S. education in a year, or presidential term, or maybe even two. It has taken us decades to get into this mess, it will take decades to get out of it. Which is why nothing will ever get fixed, because the public prefers fad policies that overpromise and underdeliver.