I understand this point, but I feel it's not only optimistic, it's reckless. I've seen so many scam companies pop up since 2008 and have learned from first hand experience that clever human beings will invent new crimes as quickly as they will invent new jobs and requiring all people to work is one of the big reasons for the rise of crime and economic decay. The ones I witnessed in action in particular were undermining economic development tremendously by preying on the desperation of those who had dreams, some small amount of stored wealth, and who could have otherwise used that amount of wealth to invest into growing the economy instead by promising them the ability to get a lot more for their investment.
We cannot ignore the issue of "me" in society. If one did not enforce labor, how many people will laze off? Even worse, how many people will get demotivated and laze off, seeing the rest doing nothing? (I've seen this happen enough in both the Kibbutz and the army)
At the end of the day, in such a scenario you may have too few people left to take care of everyone.
The issue is that this starts the arm-race between the people who wants to do the least (laze off) and the people who wants to work. While bad, it's most likely still better than the alternative above.
Again... when the economy is rigged for the wealthy to stay wealthy and continue to suck more than their fair share from the bottom
It's an intrinsic issue of economy, assuming you don't enforce either communism or enforce a high decay on savings,
Both has various known issues. I believe that socialism is a form of fighting this, though it's hard to tell if it makes things better or worse (point of view).
Another factor here is that there is really very little we cannot teach an AI to do as well or better than us and as we progress into the future this will eventually include the development of AI to fulfill other roles... yes, even the computers will be taught how to program and maintain their own systems better than we do
While there are great improvements in the field, there is still a way to go. AI doesn't know how to program, and possibly will never will.
There are certain problems that an AI (or to be more precise, a turing machine) will never be able to solve. The easiest example is The Halting Problem: if the program runs, will it ever stop? Another one is: is this the intended result?
And the most ironic thing about it is we should all be rejoicing with each thing the 'bots' can do that we no longer have to. The load has been lifted! Why should we not be able to enjoy this fact rather than be angry that need for us has been removed?
Society goes yay, but nobody wants to get fired ("me" vs "everyone" from before)
And as we become obsolete... does that mean our lives are no longer worth being lived? Is our only validation REALLY the labor we can commit to our society? Or are we intrinsically of value whether we 'work' or not?
This is some great philosophical question. To be or not to be? What is the meaning of life?
While this will probably never change, we can at least stop making wealth be a reflection of the right to live.
In a limited resources environment, this will always stay. But we can aim to remove the constraints, and hopefully from there we will manage to make this dream come true.