I am old enough to have been involved in the 6 week all out strike of 1971.
We didn't win then and we wouldn't win now.
Even in those far off days before technology really took off, businesses and even the general public found ways round the service and we had to crawl back to work with our tails between our legs with no deal made.
Tom Jackson, the then General Secretary of the UCW, never got over it and always looked a broken man afterwards.
How long could YOU manage, realistically, with no money coming in?
I believe a series of rolling strikes, losing one days pay at a time, is the only way to go.