First of all the person is a cheap tipper. That is way too low! The tip should be more on the order of $10 to $15 or more.
Second, four burgers at a little over $10 each, two french fries totally $13, lots of soft drinks totally a little over $10 dollars makes a total bill of over $60, then tax brings it into the $70 range.
If this is too much, then Burger King, McDonald's, Jack-in-the-Box are lower cost options with out higher cost.
Five Guys is trying to be a higher end place than those other firms. It is not like their prices are hidden.
Disagree. The counter server probably spent a couple of minutes getting that order right. Why should the counter person get even a $3.53 tip? If he/she serves even just 10 customers in an hour, that's $35/hr. The restaurant owner gets the benefit: in Utah (this 5 Guys was in SLC) the owner only has to pay the "tipped employee" $2.13/hr as long as the additional tipping lets the counter help walk away with at least $7.25/hr. And by law the tipping cannot be shared with the background employees: food preparers, dishwashers, or cooks. Maybe they are anyway, but I'd bet it all goes to benefit the owner since those "tipped employees" can now be paid much lower wages. "Suggested Tipping" for counter service is a racket ... but in some places it may keep your food from being adulterated.
For table service, a tipped waiter/waitress probably spends 10 to 20 minutes taking care of each table, and may be working for $2.13/hr plus tips in Utah. They do deserve tips on your scale for that 10 to 20 minutes of service, if it's good service.