salad
Explanation
The Joke
A customer at a restaurant asks to pay by weight for a salad. The server agrees, but the customer then raises a concern: what's to stop him from loading up on high price-to-weight-ratio items like croutons, dried fruit, and crumbled cheese, or selecting his salad "entirely based on running a cost optimization instead of making a salad I actually want?" The server directs him to a note on his menu, which reads: "Please be aware the salad is a metaphor for life."
The Humor
The comic uses a salad bar's pay-by-weight pricing as a metaphor for how people approach life's choices. Just as a customer might game a salad bar by optimizing for expensive-but-light items rather than building the salad they actually want to eat, people often optimize their life choices around metrics (money, status, efficiency) rather than pursuing what would genuinely make them happy. The customer recognizes the perverse incentive but can't help himself from wanting to exploit it -- mirroring how people often see through the futility of pure optimization but engage in it anyway.
The note on the menu -- "the salad is a metaphor for life" -- is the restaurant preemptively acknowledging this tendency, turning the comic into a gentle philosophical observation about how optimization and satisfaction are often at odds.