One of the problems with this, is that consumers are given no choice in packing material. I just bought a new TV. The TV had the protective sticky plastic, and was wrapped in plastic. Each individual component came in a plastic bag and then all in one larger bag.

All properly disposed of by local regulations.

The fault then somehow falls onto the consumer if it ends up in the ocean?

Taxing companies based on it seems like a trade dispute as most are not US companies. We've seen how easily those are won.