ASLEF members have somewhat more ability to cause disruption via overtime bans than RMT members.I agree the ASLEF week long overtime bans seem to be more effective and don't hurt the pay slip. I don't know why RMT seem to prefer strikes over overtime bans.
That is the problem for the RMT members, the number of contingent staff available, and parts of the railway (eg DOO services) where they can't cause disruption because they have limited involvement.The Saturday stuff isn't working, many operators still run a decent service using contingent staff, unless that is part of the game knowing that this action forces companies to get managers in at the weekend thereby disrupting their worklife balance too.
The classical idea of striking is that by withdrawing labour, and hitting revenue, the company will want to find ways to try and avoid that strike action happening.Surely more strike action just takes more money out of the rail industry which means pay rises and job security becomes less likely rather than more likely?
That is unfortunately where the strike action is failing because it is like throwing stones at an impenetrable target.