As usual, I don't think the conclusion of the survey is fully supported by the way the questions were worded. I'm not sure I've ever felt differently about a survey, in fact.
For example, if I was asked the second question, I honestly don't know which way I would have responded before being told the answer, because clearly the answer is in between the two options. Obviously it is not intended to "largely replace" your income, but also obviously it is not intended to only keep you above the poverty line, since it is based on your income during your life. So yes, it very concretely "replaces" your income, but only partially, not "largely". If it was only intended to keep you above the poverty line, it would be based on the poverty line.
Even the government phrases it as "replacing" income:
For example, if I was asked the second question, I honestly don't know which way I would have responded before being told the answer, because clearly the answer is in between the two options. Obviously it is not intended to "largely replace" your income, but also obviously it is not intended to only keep you above the poverty line, since it is based on your income during your life. So yes, it very concretely "replaces" your income, but only partially, not "largely". If it was only intended to keep you above the poverty line, it would be based on the poverty line.
Even the government phrases it as "replacing" income:
https://www.ssa.gov/pubs/EN-05-10024.pdf
> Social Security replaces a percentage of a worker’s pre-retirement income
Reading survey questions drives me insane.