Ermm
Surely they mean that people would be better able to claim Constructive Dismissal, not Unfair Dismissal. Unfair Dismissal is if you are dismissed and disagree with the reasons for your dismissal. Constructive Dismissal is where you effectively dismiss yourself because of various reasons. Normally that your employer has made your continuing with them unacceptable for some reason. (Your job has changed, things you've complained about have not been rectified, etc.)