Assuming people have enough for ten years then by the 2030s late 60s plus ten years, plus 20 years is late 90s, and it's not likely that life expectancy will have increased that much in that time span.
My father retired at 59.5-years-old because his older brothers all kicked the bucket at 60. He lived 15 years into retirement. Fortunately, he had a pension and Social Security. He spent his pension, saved his Social Security. After he died, all his bills and his funeral were paid out of his savings account. You can't rule what medical advances will keep people alive longer.