I suppose none of the ‘isms work , until competition for resources is eradicated. When there is nothing that can be gained from others ( sufficient and equal distribution of resources) , the greed goes away . This transformation needs spiritual (not religious) evolution too.

For all that to happen , population needs to go down (no genocide or wars , just education and birth control. Each married woman to have maximum of 3 children, with a minimum of 7 year gap between each child birth and in around 800 years we can reach population goal of half a billion )

( Earth can support human population of 528 million only, for all flora and fauna are to have equal room for their own progression. And we are currently around 9-9.5 billion)

I believe that once the useless/unproductive jobs are gone, people are free to do what they love to do ( as there is no threat of starvation) , there will be inventions (robots for example) to take care of tasks such as cleaning septic tanks , better designs reducing need for cleaning or even newer tech to do away with septic tanks.