The main problem with the current banking and international monetary system, is that a certain powerful person can solely decide if tomorrow's paycheck will be lower or higher then the previous one. That issue alone is disturbing if you think about it. Another problem is that we are so used to this system, that we became oblivious to any other alternatives. To back this up, you can look to the alternatives which (crypto's) and see that the people are unsure and skeptic about it, which is pretty sad really.