Your 1) assumes that workers could sustain themselves if they chose not to work. Most useful land in the world is privately owned these days - in Britain a lot of it was taken by force from the people during enclosure - and so workers can't make the choice you claim they are free to make.
> I believe the elite will work hard to prevent it, by introducing some kind of wealth/capital tax that will redistribute wealth to the not-haves.
You are an optimist then. I think more popular sentiment seem to be rather that elite will use its advantage to develop surveillance, law and prison system to detain whoever opposes them. After all they had one communist revolution to learn such things have to be actively mitigated.
You might argue that keeping poor in prison is a way of providing for them. And since less and less criminal people will go there it might some day become some sort support center for homeless/jobless.
2) However, the question whether this is socially or even globally fair is not a question of capitalism, but of politics/government. If things continue this way, sooner or later there will be too many unemployed people and there will be a revolt/class revolution. I believe the elite will work hard to prevent it, by introducing some kind of wealth/capital tax that will redistribute wealth to the not-haves.