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"a factory used to". That's questionable1) The past gives context and so we shouldn't dismiss it. In this case, it provides insight into why the current tax structure is the way it is. If the underlying premise change (ie the nature of work changes) we should look to also changing the tax system. To me, that is looking forward, but using the context of the past to inform our judgement. Imagine if the past tax was based only on agrarian income because that formed the basis of the economy when the country was founded; I don’t think we’d want that same tax structure in a modern economy when the proportion of farmers is in single digits.
2) I think this ignores the overall system. The economic system isn't one dimensional. Society benefits from the factory, but the factory also benefits from society. They don't work in isolation, so a single end goal ("just skip the factory and give people money") is an over simplification of the system and its goals.
3) But you would all pay an income tax, so (in an ideal implementation) it balances out. No automation tax collection, but higher income tax collection. The inverse is true when it spills over the automation tax threshold: lower income tax on per capita production, but higher automation tax collection.
>I'm not sold. Actually, I think there's more to it.
Of course there is, and I've admitted there would be a lot of nuance. We should be careful that the nuance isn't gamed, but that doesn't mean the best alternative is the current system, or worse, an overly simple system like a flat tax that disregards nuance completely.
>There's been an historical association between people's job and their sense of identity
Yes. There's some benefit to this, but it can easily spill over into a toxic mindset. I don't want to live in a society where people's identity (and potentially moral self-worth) is at the whim of an employer. I think the job/identity coupling is a very Western mindset (probably rooted in a Puritan work ethic), but not a particularly healthy one. That's why we have issues with diseases/deaths of desperation like you allude to. I think the better solution is to decouple people's self-worth from their work, rather than ensure people keep working.
>The oddball reality is we're sort of there already
I hear this a lot, but it reminds me of when I was in college (decades ago) and I had a professor (who was nearing retirement at the time) and he spoke about when he was in college he had to write an essay about how people would manage their lives when they no longer had any work to do because of all the efficiency gains that were just on the horizons.
>As a species we are enslaving ourselves to the perpetual feed through laziness.
I think this is the Aldous Huxley A Brave New World viewpoint (written in 1931) so I don't think it's anything new. FWIW I tend to agree.