Since you've worked in fast food, I'm surprised that you get upset over that. They have to try to upsell EVERY order, or they can be fired/demoted. If a secret shopper comes through, and they don't offer an upsell, they're gonna get in major trouble. And Arby's is the fucking WORST about it. They're so fucking anal. Did you know that the turnovers MUST have 7-9 stripes of icing? Any more or less and you'll be in deep shit. Same with everything else there.
tldr; It might be frustrating, but just say no and move on. They're simply trying to make rent money, man.
It's not really the suggestive selling that bugs me. It's the being asked twice. "Anything else?" and "fancy a turnover?" could easily be combined into one non-irksome phrase.
But I'm glad you brought up secret shoppers. I just want get this all out in the open and leave it...
I was an assistant manager when the chain I worked for rolled out their secret shopper program. It was a bunch of hubaloo, hand-wringing, and unwelcome anxiety worrying about getting a bad shop. But we got a really good one on one of the shifts I was running. I got a "good job" and a pat on the back.
I was kind of new in that store, and the store manager was a real a-hole. Raised Cain during the first week I was there about inventory coming up short. He wanted it fixed; bitched me and two others out, telling us it was our job.
So about two weeks after the good shop I fired a woman for running her own business out of the register. Selling stuff, not ringing it up, had about 50 bucks over in her drawer. Firing her meant we were going to be short a person that night. Then two of her friends called in. Then the Friday night drunks started pouring in. Things got chaotic, and not in the good way.
Right in the middle of this understaffed free for all, the store manager, the area manager, and the district manager all showed up. Strange, because I never saw them out and about at 2 a.m.
Turns out the woman I fired was the store manager's booty-on-the-side. Her friends calling in, then him showing up with the higher-ups wasn't just happenstance. The area and district manager gave me a lecture about firing in haste; my good shop from earlier was not mentioned. The next day, the store manager hired the thief back.
Also, a couple months after that, I gave one of the employees $40 to go get me a bag of weed, and I never saw her again. She was on crack though, so it may be unrelated.