I'm really confused now. If we workers are selling our services, our wage is the price of those services. That wage is agreed upon in a contract. My understanding was that our taxes come out of the money allocated for that wage, not out of a pool of general money in the employer's hands. If this understanding is correct, the employer can't just arbitrarily lower a salary because taxes are no longer being withheld from it; it wasn't the employer's money anyway. If they wanted to lower salaries, wouldn't they have to renegotiate with every current wage-earner?
Of course, this issue only applies to current salaries/contracts. I can see that things might be different for people starting new jobs.
I hope I'm not being naive here. But wouldn't there also be some savings for employers if they no longer have to do the government's money-collection for them (at least on the payroll end)?
Most employees don't have an explicit contract. The employer can say "Next month there will be a 10% pay cut. If you don't accept that, please report to the personnel office to turn in your resignation." Although I guess that would be considered a form of renegotiation.