And if you pay taxes and social security for 20+ years why wouldn’t you be entitled to it? Especially considering you wouldn’t be using expensive programs like Medicare.
What benefits? I don't know every country in the world, in Germany unless you count retirement as a benefit (which is something you pay for and have to reach a certain age that is ever moving upwards) you don't get any assistance if you're not living in the country.
Benefits aren't collected in cash, they are sent to bank accounts. The beneficiary can be anywhere.
When were you last summoned, or visited at your adress by government officials to verify that you are where you said you'd be?