The person earning the federal minimum wage of $7.25 isn't going out to eat at restaurants. They're not taking piano lessons. They're not going to the gym or the yoga studio. They're not sending mom flowers on Mother's day. What good is this person in the economy? If you raise it to $15 an hour, they're doing all of those things.
If you want to become physically stronger, you'll need healthy habits - like going to the gym. You'll also have to give up unhealthy habits - like eating junk food. Building mental strength requires healthy habits - like practicing gratitude - while also giving up unhealthy behavior, like giving up after the first failure.