It’s time for Walter to quit so he stops by to visit Gus Fring. Gus wants to offer Walter 3 million dollars to keep making his blue meth for 3 more months, but even that amount isn’t worth it to Walt. Walter is trying to piece his life back together and believes that continuing to produce his blue meth isn’t worth the amount he’s giving up. Walter admits to Gus that he has more money than he knows what to do with. Even for the wealthy, there’s diminishing returns to acquiring more income.
See more: cost benefit analysis, diminishing returns, exchange, opportunity cost, tradeoffs
The Economics of Breaking Bad 