Not sure that ATSSD would even contemplate agreeing to single person operation.
No safety case you see.
Next up, even if you were to TRY to operate electronically on your own, may I suggest that 90% reduction in traffic is probably more reasonable.
Please don't forget. The Airlines get punished NOW when we have one or two people sick. Imagine a day or two of industrial action. You don't even NEED everyone to come out, and yes, I accept that some would not. It wouldn't really matter. The majority of ATCOs would. The system would not operate at a level anything close to what the airlines NEED.
The nub is simple. Settling the pay claim IS a LOT CHEAPER THAN ONE DAYS INDUSTRIAL ACTION. Are you listening airline members of TAG (and those airlines that aren't). Present us with a REASONABLE offer and you can put all this to rest, NOW.
Rgds BEX