Higher Education Pay Disputes and Industrial Action

It has recently been announced that University pay for academic and senior professional staff in UK universities has fallen by 13% in real terms since 2009, despite students’ tuition fees having trebled over the same period. The University and College Union (UCU) assert that a consequence of this is that pay for academic and senior professional staff ‘will fall still further behind the cost of living’. In response to this, members have pursued industrial action in order to attempt to secure fairer pay offers. Should we support this industrial action?
 
 
I think that there are four types of reasons that can be offered in defence of supporting the strikes, though I am unsure of how decisive any of these are, even in combination. The first reason is the one most explicit in the UCU’s literature. It relates to the fact that academic and senior professional staff ‘are being asked to work harder and take home less money to their families year after year’. This is thought to be particularly objectionable given the vast pay increases witnessed by Vice-Chancellors and Principals. This reason is a poor one. The vast majority of academic and senior professional staff in universities live very comfortable lives, getting paid generous salaries for work that they in general enjoy doing. In essence, I simply struggle to understand how an academic who earns an annual salary of £30,000+, which is comfortably above the average in the UK, can have that much of a complaint against being asked to work harder and take home less. 
 
A second reason relates more specifically to the pay of junior academic staff and graduate students. These people, who typically take on the brunt of teaching, are notoriously under-paid. Perhaps this provides an argument in defence of supporting the strikes. I am not convinced by this argument either. My sense is that junior academics and graduate students are in general very talented people who have many more opportunities open to them than most. I appreciate that getting by can be tough, but when they complain about the state of their pay my gut reaction is to say ‘Well, if you don’t like it, do something else!’. To those with some familiarity with contemporary political theory, I am tempted to say that academia is in an important sense just like an expensive taste.
 
A third defence relates to the pay of non-academic members of staff including, for example, the pay of cleaners, porters, administrators, etc. There is a much stronger cases in defence of protecting further their interests. The problem with this, though, is that, as far as I can tell, this is not one of the aims of recent industrial action. Notably, for example, the UCU represent only academic and senior professional staff in UK universities and much of their literature discussing these issues makes no reference to the pay of non-academic members of staff. It is not clear, therefore, the extent to which the strikes will further this goal.
 
The fourth reason is suggested by this statement made by the UCU: ‘If the pay cuts don’t stop and the universities do not start to invest some of the amassed money into tackling the issue of falling pay, the quality and reputation of our higher education system will suffer’. On this reading, the justification for industrial action is not (principally) self-interest; rather it is partly out of a general concern to protect quality in higher education. (The fact that those on strike stand to gain financially from doing so is simply a convenient coincidence!) In order for this justification to prove decisive, it must be both that quality in education is (strongly) correlated with the pay of academic and senior professional staff, and that this would be the best (feasible) use of the money. Both of these claims can be doubted. 

As someone who considers themself on the political left, I am generally sympathetic to the use of industrial action. However, in this case, I am yet to be persuaded. What do you think?