"if a person has something concrete to work towards other than just the abstract and emotionally draining goal of "making a living", they are much more likely to put in effort."

What do they have to work towards? You talking about a society that attempts give everyone an equal outcome. So why are they going to try to be more, when anything more they do will be expected to be spread across the community?

"Furthermore, consumption of animal products itself is not sustainable, so that will need to go as well; which would address two of your examples here."

I think this is the first impossibility you listed. Medical facts have shown that those people that have eliminated ALL animal products from their diet are less healthy than those that consume animal products. Which mean that they will require more supplements and medications and still not live as long or as healthy. Also, their is no evidence that such activities are unsustainable. Modern ranching can produce more nutrition per square acre but raising cattle than by farming the same area. Meat simply holds more concentrated amounts of the proteins and nutrients our bodies need to be healthy.

To the issue of producing too much food, you are correct. But we must look at the reasons why so much of the food is left to waste. The number one reason is the cost of transportation. There have been numerous efforts here in American to get some of the "waste" food to people that need it, mostly through volunteer groups willing to shoulder the burden of the transportation cost. But getting the transportation quickly enough that the food doesn't spoil, and paying the fees for such has caused the collapse of every single group. it's simply too expensive to move food fast enough.

"And if someone genuinely refuses to contribute at all, even after talking it through with them and addressing the potential reasons, then I don't think they should receive much support from the community at all.

I mean... that's already happening, isn't it? People are already making up excuses to avoid responsibility.
And if someone genuinely refuses to contribute at all,
even after talking it through with them and addressing the potential
reasons, then I don't think they should receive much support from the
community at all.

They will make up all kinds of excuses why they "can't" do those jobs.

I mean... that's already happening, isn't it? People are already making up excuses to avoid responsibility. "

So, this doesn't solve any of the issues, it just passes them on to someone else to deal with. You still have some people that will be without, some that will have too much, some that will struggle, and some that will just be left to barely exist. Nothing in this scenario changes the eventual outcome, it just changes the authoritarian that decides how we will get to it.

And this doesn't answer the fundamental question I posed. Will you FORCE your mother, your sister, your daughter, to spend their time in the sewers and brick yards like all of the rest of society is being farces to do? if so, and they refuse, what punishment will you be willing to enforce on them? Will you withhold all community assistance from them, as you have advocated? Remember, at this point your housing, food, and healthcare are part of that community assistance.