It is indeed about overtime earnings. As ASLEF are pushing for no scheduled overtime (AIUI), it is hard to feel to sorry about affected members, but in reality it became commonplace for many financial institutions to use overtime which was sustained over a period in affordability calculations and many people over-extended. Interest rates have gone up too I understand, so I can believe that many people are quite seriously affected by losing their overtime - which I think was the ops position.
The OP has also said he thinks establishments should be increased and that drivers shouldn’t be doing overtime, thereby denying them of the ability to earn extra permanently (and also seems to be against them taking action to protect pay and Ts and Cs). If you hold that view it’s a little odd to then be critical of ASLEF for calling an overtime ban, specifically on the basis it will cost their members money! Especially when the members have voted overwhelmingly in favour of action short of a strike.
There is a tendency for certain members to criticise ASLEF whatever they do, even where this is inconsistent with the views they have expressed on other matters.
On "going back on agreements", with regards to the overtime agreement, I think I recall that it had expired - therefore it was finished and there was no agreement to go back on. TPE offered a new agreement - at a different rate and ASLEF told them to get stuffed (apologies if I'm conflating agreements). Whilst I can quite understand why the union would do this, I don't think it is reneging. The world is full of examples of new deals which differ from old deals being negotiated - by both sides - in light of the current circumstances.
Re. The bolded statement, yes I think so.
The agreements being breached weren’t the overtime agreement, which was indeed pulled by ASLEF months ago, and there has then been a deadlock about the rate offered. There was an agreement in principle to reinstate RDW a few weeks ago at the original rate but AIUI this wasn’t accepted by ASLEF due to annual leave arrangements etc. being reneged on by the company.
Now the approach has changed and an agreement at the original rate has been reinstated. I don’t work there as you know, and of course you have to accept some level of posturing/Chinese whispers, but I’m confident the above is
basically right!