You're comparing apples to oranges. Food stamps are only made available to the poor, so of course the average income of food stamp beneficiaries is going to be below the national average.
As for seniors being the richest demographic group in the U.S., these people have 40+ years of work behind them.......along with 40+ years of retirement savings. That "wealth" that they have accumulated is what they have to live on for the rest of their days. Would you prefer that they didn't have retirement savings, in which case we would be having to support all of their needs?
I'd prefer constitutionally limited government that didn't pander to groups based on their proclivity to vote.
Remember when that was the bedrock of conservative thought?
So I assume you think food stamps would be a good idea so long as everybody qualified for them?