I tend to agree with several things you talk about, but I have the impression we see things differently. For example, on one hand I agree with you when you say that we cannot let the Rich-Super Rich Economic Classes/Owners to just produce even a single new piece of plastic, but on the other hand for me the root of the problem is that the extraction of oil worldwide is still expanding instead of phasing out. Meaning that, as long as this is the case, more and more plastic will be produced.
Apart from that, of course bacteria eating plastics sound like a great option, but they are not the only way to get rid of plastics. Some alternatives would be fungi that "eat" plastic, or mycelium that replace plastics. Here are some relevant articles.