Flat tax or Flat tire

In our government and how our people view taxes, there will never be a perfect system for the government to collect taxes. When it comes to the taxes either way the government collects them someone will feel as if they are getting the short end of the stick. By this I means like the lower class may feel as if they are paying more than the rich and vice versa. The rich also may feel as if they should not have to pay more than the poor because they earned their money themselves.
I do believe that a tax of percentage at a set rate would produce the best result throughout the United States. Like having a 17% set rate would be good, because then everyone is losing the same percentage of their pay checks. This way would still cause many problems throughout United States because the rich will feel like they are giving up more of their paychecks when in reality the other classes of the class system are giving up the same percentage. Any other way you set up the tax collecting would cause just a lot more problems.
Like a set amount for every citizen because, that amount may not affect the rich as much as it would the poor because $5000 to one person may be nothing but to another it could mean if they can eat supper at night or not. So this way of the government collecting taxes would only decrease the middle class and increase the lower class and this is neither what United States wants nor needs. The United States needs a stronger middle class and we should be helping people leave the lower class into the Upper class and middle class. So a set percentage of taxes would do the United States good from my point of view.