but you'd have 6% fewer doctors to service at risk communities. Those bottom 6% still meet the qualifications required and often gravitate into general practice/primary care where there is the greatest need.
If the bottom 6% still represents qualified instructors, you will only increase the workload on the rest if they are gone from the system.
Suspect that a significant proportion of those targeted are more senior and therefore more expensive teachers that are less inclined to tolerate the kind of foolishness represented by dubious new standards and teach-to-the-test curriculum.
ETA:
If TFA was only a supplemental program, i.e. adding instructional staff to reduce class size, it would be welcomed openly across the communities. As an alternative to existing accreditation policies and resources, it will always meet opposition.
Another medical analogy: PAs as supplements to a practice allows more folks to be served at an appropriate level, but you never operate without the professional having the final word.