I feel like free wifi in airports is essential these days. It really affects people’s perception of the airport.
The question is who should pay for it – I would argue that it should be a public/private partnership. Perhaps the airport authority can afford it by themselves in the same way they pay for bathrooms, rocking chairs, etc. Another option is perhaps it is free but with sponsors – they have a captive important audience at airports and I’m sure people would pay for advertising.