Capitalism is the best idea for you life, rights, prosperity, happiness, . . . and of all if they chose it. It does not mean it requires you to be the richest person, the famous, the business owner, the CEO, . . . but ONLY what you chose as your career or work. To be the best you can be, to the specific ability you have, no matter how low, or high.
The meaning of the term "duty" is: the moral necessity to perform certain actions for no reason other than obedience to some higher authority, without regard to any personal goal, motive, desire or interest. Who in hell can have the right to claim that sort of submission or obedience? ~ Ayn Rand