I suspect those who have any period of time on furlough without their company topping up from the 80%, especially where they may have seen their pay fall by more than this by being above the pay cap (which at about £30,000 could include others getting similar pay to some of the higher payed staff in the article) and/or have been threatened with redundancy and/or haven't had a party rise (especially if that's been the case for a few years) will have little sympathy for the RMT (and less so for the MP's).
Just because there's a high profile example of someone who shouldn't really be getting a pay rise doesn't mean that everyone should get a pay rise, in fact of I was performing badly and cited the MP's as also performing badly and therefore why I should also get a pay rise my boss wouldn't thick too highly of such an argument (not that this is a comment on the performance of the staff in question, just highlighting that citing MP's isn't a good case study to use to justify pay increases), especially if the company had been struggling due to the impact of Covid-19.
If people want to put a case together for why they justify a pay rise then they need to do it by explaining what they've been doing which justifies such an increase. Even if that's to show why they need one to cover the increases in the cost of living due to inflation.
With limited public support and the low number of passengers, as others have highlighted, the threat of strikes is unlikely to hold much fear on the employer side of things. Especially if a few trains don't get cleaned for 48 hours, what's it going to matter.
If anything but striking out may actually increase the risk of outsourcing. As contractors are used to cover strike periods and if it's shown that they perform well enough for the same or sightly less cost then they could be used to cover overtime (especially if overtime attracts a greater than 100% pay rate) or other staffing gaps (such as replacing staff through natural wastage as there's often significant costs in recruiting and onboarding new staff).
As such just because someone isn't happy about such a strike it doesn't mean that they are Torry, however defaulting to striking in the current situation also isn't going to necessarily get what staff want and may actually make it that the increased use of contractors on reduced terms may very well be the outcome that is achieved by the strike.