I think that's probably far too broad. E.g. I don't have a problem with the IRS using computers to calculate how much people owe in taxes based on the info they collect. The number of people it would take to do that manually might be unreasonable. W-2 info has to be to the IRS by Jan 31st, taxes are due April 15th, that's 51 days to generate a couple hundred million tax return numbers.

Federal payroll is something else that would probably take an unreasonable number of people to manage manually.