No offence but I think you've crunched those numbers wrong.
Even if you were at the top of scale 10 I think you'd struggle to lose a grand.
And that's before you can claim for
strike pay
- those of you earning £30,000 or more will be able to claim up to £50 from the third day onwards
- those of you earning below £30,000 will be able to claim up to £75 per day from the second day onwards.
So if you are £30,000 you will lose £658 (30,000/365*8) but then you can claim back £300 so you will be down roughly £358 (might get more complicated if you move across tax brackets but that's about the ballpark). In addition, you could very well find your region/branch will be topping up that strike pay so you may lose even less.
That's before we get onto the argument about how you can't afford
not to strike as otherwise your pay/pension is going to be shot.