It think the world you're envisioning sounds lovely, and I would love to live there, but I don't think it would work without a fundamental shift it the way humans behave.
Of course.
A bridge of practical ideas would have to be built...but it is not impossible
What about people who choose to just coast, If the costs of this plan were to exceed what it is producing, how would you get them to pull their weight?
Explain to them that because of inactivity and commitment (personal energy resource into this collective undertaking) that food will be short this winter, and they miss out.

Seriously, this would have to be included in the overall bridge plan.
It could be accomplised with minimum disturbance to the flow of the system of things right now.
Who builds the roads the homes the power stations etc? The People do. The reward system is being overhauled 'tis all.
Rather than force taxes to upkeep, the upkeep is naturally done by those who do these things best.
Also. there are many countries who suffer crime and unemployment, which still produce surplus to requirement, even with one chunk of it's citizens either unproductive, or uncooperative.
Would their be any rewards for those who did good work (more than was asked of them)? I heard that one of the problems with Russias attempt a communism was that no one (or at least very few) strived to anything more than that which was required of them.
The rewards are food clothing and shelter (medical things inclusive.)
It is not really reward but recognition that the are everyone's birthright.
And also the recognition that in being born, you signify that you are willing to contribute to this system.
The idea of reward will fade. It will be more like a happy duty.
Also, how do you determine what is neccesary for people to live? Is a tiny box of a house sufficient shelter, or does a bigger house provide something that a small one can't?
Hmmm....Where would you like to live and what new skill would you like to learn?
Food shelter and clothing of reasonably good standard are all that most people require, as far as basic happiness goes.
Don;t limit things to how they should all look - allow for artistic flair and the fact that a house is not now needed to be lived in for the rest of your life - you are free to move on and find another house totally different - a bush hut here, a castle there....imagine.
While there, look after it as your own. Leave it as, or better than you found it
But how do you know the complex motivations of those who commit crimes? Would simply providing them with the neccesities of life actually do a lot to curp their criminal ways? What about people who commit crime to rebel against a world they consider boring? People who get pleasure from working agaist society?
Basic crime is a social disorder due to individuals thinking they have the raw end of the deal.
They allow themselve to become societies victims, and then set about taking it out on the thing they blame for their misfortune.
So in a way, providing people with the necessities will for the fiorst part, show them that they are respect merely for being born.
There is no real reason for ennui other than having nothing to do. What do the bord want to do?
For example, in this system, you might wish to learn the skills involved in total house building.
This might take five or ten years...maybe less...deepens on the individual.
Same individual might them want to learn farming, or whatever.
Not having to maintain a skill in only one area for most of ones life (just to pay the bill) signifies a chance that variation will also releive bordom.
People who get pleasure from working against society do so believing that society is their major problem, so any kind of strike against society gives them a pleasurable feeling of achivement.
It is achivement thus which really gives pleasure.
And of those criminals who still persist, how would teaching them skills make them change their views about criminal behavior?
There are exceptions to the rules, as the saying goes...like our two famous loonies who worked together in this suicide by volluntary being eaten situation.
In general, most individuals will change their views when the nature of their complaint changes.
That is to say. most crims are grumbling about getting a raw deal. Who would grumble if FC&S were given as part of the birthright of one and all?
Ultimately they cost society a lot already, and this is without any significant inroads into rehab success.
Who but humanity can create and explore and develope ethics which can free us from the burdens of our self imposed victimhood?
I say that the sensible can at least make the first steps and initiatives.
What about people who choose to just coast, If the costs of this plan were to exceed what it is producing, how would you get them to pull their weight?
We must remember that everything humans use for materials are freely avaiable from the Earth.
It is just the system of rewards and earning the right to life etc...which has placed a price on everything.
In reality, what energy does an individual have, which isnt provided freely from a natural event?
It is humans who have chosen to be the middle-men and put a price on this free energy.