Well we did this for the bags (put a high price on them) and banned some others (e.g. straws). My fear is that taxing plastic items more (let's say of VAT is 20%, plastics could get 35%). Then our dear politicians on Year4 will pass a law to "redirect the extra collection for blah blah blah" and it will end up _not_ to the effort of mitigating the plastic pollution, and we will be stuck with one more tax _and_ the pollution!!