Hain breached the injunction, but he is protected from the consequences of this because of parliamentary privilege. He is being strongly criticised for this because parliamentary rules suggest that it should not be used to disclose matters which are sub judice. Nevertheless Hain is probably safe from being prosecuted for contempt of court, which might have happened had he made his statement outside Parliament, but he may still be disciplined by the parliamentary authorities.

I don't really see why civil court proceedings should be considered less worthy of protection than criminal cases. They are equally important in protecting people's rights, and whilst the law is certainly more affordable for the rich there are plenty of examples of where ordinary people are able to use the law to protect themselves.