Forty-nine years ago, McDonald’s created a jingle that only ran for a year and a half but managed to Hx itself permanently in the popular consciousness. The Big Mac song emphasized value, reflecting the recession- era gas-rationing mindset of America in the mid-’70s; its impact, however, lasted beyond those tough times. You can trace a direct line from Subway’s “$5 Footlong” jingle, with its focus on a lot of food for little cash, back to the Big Mac song.