And most of them will sign the contract because its offering some form of security.
easyJet are taking advantage of the poor economic situation to rape and take advantage of these people, who it could be argued should have known better, but thats a different matter completely, by offering them a permanent position with some benefits which compared to the contracts they're on currently is actually worse.
But ultimately it is a 'job' as opposed to contracting and they will have more employee 'rights'. The industry is not going to improve for the foreseeable future.