Earning an income is one criterion for being a good president. But a president cannot act on his own analysis or persuasion. There are a lot of forces around him. In fact, one who wants to act on his own cannot make it to the presidency especially in the United States. After one term, Lyndon Johnson could run for reelection as president but he withdrew from the race after consulting with some wise men of America. He was reported as commenting "How could I be president if I could not go to a conference table and say what I want?"