The Flat Tax would be a fair system where everyone pays the same percentage in taxes. This system would have many benefits because most flat tax plans remove deductions and loopholes so that way no one can cheat on their taxes. The main opposing argument for the fairness of a flat tax is that it doesn't make the rich "pay their fair share" but the fact of the matter is that the rich would pay their fair share. Under a 10% flat tax a person making $10,000 a year would pay $1000 while someone making $1,000,000 a year would pay $100,000 in taxes 100 time that of the other i would say that is definitely a fair share.
Everyone paying the same percentage in taxes would be fair if everyone worked about as hard as each other. If everyone works equally hard, then I agree a flat tax should be used. However, this is far from reality. Those in the top percentages of incomes consistently have to do very little work to maintain their same income. Those who are poor, however, often expend a great deal of effort just trying to find a job. While big business tycoons can relax in their corporate headquarters knowing they're making dollars per second, the poor may have to work all day or all night just to make less than enough money to live on. It's not fair that these two incredibly different groups of people should have to pay the same percentages. The rich can afford to pay significantly higher taxes, as it doesn't affect them nearly as much since they have such high incomes. The poor can't, since they have so little.