I expect nothing back, and furthermore, I hope for the sake of my country that the system no longer exists by then.
The important thing is that you vow to us that you will never accept any of your money back.
That you will faithfully comply with the law and that for 55 years you will pay up to 15% of your annual income, but when the day comes for when they ask you which address to start sending your checks to, that you refuse to accept any of it, and tell them to just keep it.