How did FDR raise income for seniors? Min wage increases? The problem with Democrats is that you're not even good hacks. It's just a club for people who demand limitless stupidity from government.
He had Congress institute a payroll tax on all wage earners to fund a redistributive program known as Social Security, which also helped fund the federal government through the purchase of Treasury bonds. Of course, Social Security wasn't nearly enough to end elderly poverty as it was known then; that would have to wait until Medicare was passed in 1966 under LBJ. If you would like to learn more about poverty among the elderly prior to Medicare, I would advise you read
The Other America by Michael Harrington.
Also, FDR was the first president to push for a minimum age, and it was set at 25 cents an hour in 1938.