Groundhog
I can understand that as a local business person, why you would be happier that the local authority run the airport than a contractor.
However, when Serco (or any other private contractor) take on a local authority contract, they offer better value for money for the council tax payers because the staff take on "multi function contracts" wherever this is feasible, ie with operational staff at the airport, it means that if the the grass doesn't need cutting, the grass cutters will be allocated another task, and overall, ground staff will encompass a number of roles.
It also saves the council a lot of employer costs, which should eventually mean a better return for the council tax payers, which probably includes you.
I accept that with the exception of a few specialist trades (such as ATCOs), it will also mean that employees at the base level will lose out in the long term, but that is a risk that exists in almost every industry these days.
If that's what it takes to keep the aiport going, so be it, there will always be a ready supply of people willing to take those posts.