Dear Rusty: I’m 63, married, and we file a joint tax return. If I claim Social Security now and keep working and earn $7,000 more per year than the annual limit of $19,560, I know I’d have benefits withheld at the rate of $1 for every $2 over the limit ($3,500). But if I were to contribute $7,000 to a conventional (not Roth) IRA and take the deduction, would this reduce my ear...