Comment by miki123211

In the 21st century, the only professions that can successfully unionize are those you can't replace with workers from a non-unionized country.

If your students are in Oklahoma, your teachers also have to be in Oklahoma. If the Oklahoma teachers unionize, you have no option but to hire those unionized teachers if you want your students taught. If your bank is in Oklahoma, you can hire programmers in London or buy a SaaS from a company based in Geneva.

Programmers also have much less of a reason to unionize, as "quit and go work somewhere else" is often a realistic option. This is usually not the case for teachers, where the only employer seeking their skills in the area is the government, whose idea of what teacher salaries should be is not based on market forces.