The Charter has been used by the courts to shoot down incoming legislation. So, in a way, those pieces of paper mean everything, as without them legislation would pass without the judiciary branch being a check on the Bloc’s powers. Your comment is merely cynical.

In theory these limit the power of the EU, while anything the EU parliament passes can just be undone as easily by a future EU parliament. If you don't believe the EU charter provides any protection, why would you believe an EU law would be any different?

Thank you for telling them. Governments do not care about anyone.