It really is all too vague for words. There are so many questions to ask about this "research"...never mind if it's all managers why is there a picture of nurse, fireman and a police officer? They are the face of public sector workers, how can you compare their roles to private industry?
And if people think it's so easy to work in the public sector and pay and conditions are so good, why don't they go and work in it? Might be able to afford to buy a house then.