The Question is if Robots should pay income tax? Robots replaced humans that paid tax. The society still needs income. Tax wise do you replace the replaced workers with zero tax robots or do you tax robot workers? When a company do not pay tax or pay lower tax they do not pay for schools and roads. That is not cool. We still need roads and schools to build a future society. Ie the bigger question is that of income di…
Robots should pay tax in exactly the same way that the wheel, internal combustion engine, fire, chemical fertilizer, electric motor or stone axe paid tax.
You're trying to do macroeconomics (calculate tax revenue) with a microeconomic analysis (looking at one task/job in isolation). What happens in practice is that the people displaced by productivity gains (shoemakers, maybe) eventually find work in the broader economy doing jobs (like programming computers) that were previously infeasible due to labor costs but now have access to cheaper labor.
Obviously there are social aspects about distribution and justice inherent to rapid change like this. But they have nothing to do with tax revenue.