It was a bit confusing, but when I said "amount of that type of material which is actually recycled", think I'm agreeing with @surement: look at the amount of m

It was a bit confusing, but when I said "amount of that type of material which is actually recycled", think I'm agreeing with @surement: look at the amount of material in the actual landfill stream vs the recycle stream. If studies show that overall, 1% of plastic is recycled and 99% goes to the landfill, then all plastic material in all products will be charged at 99% of the tax rate. The incentive here is to encourage companies to develop technology to move the recycle rate from 1% to 10% to 50%, etc. Adjust that discount quarterly or annually or whatever.