Final answer:
Getting a sandwich at Panera Cares without donating isn't a 'free lunch' because the meal's cost is accounted for in the cafe's operating expenses which are funded by others' donations, demonstrating the adage that there's no such thing as a free lunch.
Step-by-step explanation:
The concept behind Panera Cares pay-what-you-can model is that no meal is truly free because someone, somewhere is covering the cost. When someone receives a sandwich without contributing a donation, they are not getting a "free lunch" because the cost of that meal has been factored into the operating expenses of the cafe. These expenses are then covered by those who can donate the suggested amount or more.
This setup is similar to how businesses recover costs for promotional items, like "free appetizers," by raising prices on other services or products. Furthermore, when looking at the bigger picture, including labor and indirect costs such as waitstaff relying on tips, the concept that "there is no such thing as a free lunch" stands true. This saying reflects the understanding that resources are limited and someone has to pay for the goods and services provided, underscoring the importance of charitable contributions in sustaining such a business model.