Are we really dealing with "scarcity" at this point?
Supermarkets throw away literal millions of tonnes of food annually. "Reduce, reuse, recycle" has become a hollow mantra that cannot be truly adopted by the profit driven design philosophies of consumer products. Sustainability is being treated like some chic perk rather than a critical topic that must be taken seriously if we want any hope for our futures.
All these things are profoundly capitalist problems. Of course, it's not like marxist-leninist 'experiments' fared any better, devolving into their own variants of capitalism, but there are many other socialist ideologies to consider (such as anarchism...)