Of course not all the jobs are well paid but there will also be pilot and cabin crew jobs as well, if there are extra aircraft for based airlines then also support jobs in the crew rooms, and HQ’s as well.
so your argument is because the majority of jobs won’t be well paid then there should be no expansion. You all seem to think the business park is a better idea than a second terminal. It wouldn’t be some high tech offering, more than likely more amazon style jobs as the flavour of the times is supply chain, logistics and next day deliveries..... or let’s just not have any jobs at all shall we ? Close down the airport and all the retail in the town, warehousing, transport staff, carers, cleaners, security guards etc and have everyone unemployed because the hours or pay offered isn’t at what you consider an acceptable level.