It's not a Ponzi scheme. You simply tax the thing (savings from firing humans) that is increasingly eating the lunch of the other thing (humans being employed),

It's not a Ponzi scheme. You simply tax the thing (savings from firing humans) that is increasingly eating the lunch of the other thing (humans being employed), which you want to subsidize, because of a constraint libertarians don't mention (we want all humans to live even if demand for their labor is low). Here's what you do: 1) Tax the monetary gains made by corporations from greater automation, not enough to disincentivize R&D, but enough to counteract inflation from step #2. 2) Institute an unconditional basic income, like Alaska already does for natural resources. Everyone gets a check in the mail. You balance #1 and #2 so there is no net inflation. The more corporations lay people off in the aggregate, the more wages will be replaced by UBI.