What is "enough" depends on the person, both on his need and his mind. Some people make more than enough for what's needed for their lifestyle and still "It's not enough". Ever wondered why some company top brass still engage in illegal schemes to make money even though they're already fuckin rich?

Me personally I just want my basic needs met and have enough for saving to make sure I live comfortably till I die. But even then I know that people's "needs" change over time. Like for now I'm content with my 3 y/o phone that I got at around $140 at the time, who knows in the future if I'd consider buying a new iPhone every year a "basic need". 

Humans are perplexing sometimes.