I feel like part of falling for this is being in a job where you don't question management doing stupid shit that shouldn't be your job. I works hope that $5000 would ping your bullshit meter, but I could easily see falling for a more believable story. Maybe not at a fast food place but like, a big office or some place where there are bullshit parties. Especially with a spoofed email or text rather than a voice call. "It's [some fake appreciation day] and I need to bring in cake/gifts, I don't have the business card on me, buy this $200 gift card and give me the info."
If you're stressed and have a shitty boss with no boundaries, I could see it working.
Honestly the US credit system is one big scam