Plastics should be taxed.
Because plastic is so cheap, producers will pay the tax, continue using plastic, and pass the costs onto consumers. Given the higher cost of other materials, changing consumer behavior (which is not easy, but it's happening right now, and achievable through further exposure and education) may be the only way to change producers' behavior. While a tax seems like an easy fix, it may also cause the government to come to…
Consumers will buy far more of the now cheaper and more sustainable products and producers who continue using plastic will declare profit warnings and some will become insolvent.
Isn't that's how it's supposed to work?
Governments survived losing income from cigarette taxation thanks to e-cigarettes.