Does it matter? In the US, we send a sizable portion of our paychecks to the government's Social Security program so it can provide for us in this exact scenario. The government dictated the terms and we upheld our end of the contract on pain of incarceration. Now it's time for the government to uphold their end.
Technically, SS provides for the next generation. We pay into it to the next generation can use that, not the current one. It's a pyramid scheme meant to pay out early and then die. The math doesn't work if the individual expects to retire on it. It's a great scam.