If the crews are willing to ruin their lives over a minimum wage job (as many of them will be on), then that's their choice, but no rational person would choose that. I'm sure working on a ferry was cool, but most of the service staff will just get a job doing something else on that sort of money without any sort of difficulty, it's an employee's market at the moment, people can't get staff.
Much harder for the captains and the likes of course.
The worst impacted crew are likely to be the RMT ratings - the deck crew who carry out the maintenance, carry out mooring operations, direct vehicles on the car decks etc, and engine crew who do the maintenance and operation of the machinery. They are well paid, but there are very few jobs available for RMT seafarers, most companies won't go near them. The officers, both deck and engine, will be mainly Nautilus members, and should easily be able to find other jobs - there is a lot of demand at present. Where they will struggle is with conditions - not many companies will be offering week on - week off or similar contracts. If they go deep sea then 3 months on, 3 months off is much more common. As you say, the catering crew should have no problem getting similar jobs ashore, but possibly not with such good wages - most seafarers do not pay income tax, which makes it expensive to come ashore - it is unlikely that many of the existing crew are on minimum wage, wages will be much higher.
@BayPaul you seem to know what you are talking about.
Where is the line between the crews currently on board lifting the ramps (like Pride of Hull) and refusing the rightful owner of the ship to place their official crew on board (no matter how morally reprehensible that is) and actual legal definition piracy?
Thanks! I know a decent amount about this area, but I must admit that one is something I am not certain about. I don't think it could count as piracy or similar, it is more in the line of not following a reasonable instruction - so an employment law kind of thing.
Historically, taking action of this kind has been common, and it has been very rare for police to try to retake the ship. Effectively it tends to develop into a siege type situation, with the company happy to sit it out, and wait for the conditions onboard to deteriorate (food running low etc). There have been some very, very long situations like this - I seem to remember the 1987 P&O Ferries (yes, they have form!) one lasted for 6 months.