How are the poor going to get poorer when using my idea? I'm not asking them to pay more taxes.
Again, because this doesn't work. Flat rate taxes only causes disparity between the classes and furthers the poor get poorer and rich get richer scenario. Lower classes suffer the most while upper classes barely feel a hit. And you know what happens when the gap becomes too large? Complete collapse of economy and government. Go read your history.
Besides, the government has to make up this deficit somehow if they did a flat rate. This money won't come from out of no where.
And, regarding your comment about government deficit, if it is a fiscally responsible government then it would either have no or very small deficit. People, no matter how rich or poor they are, should not have to pay for government's mistakes.
You keep quoting Gates. The dude is obviously rich and clearly very philanthropic. Good for him. If he is such a goody-goody and thinks rich should pay more, why doesn't he give his money to the government. Just because he finds no joy in having lots of money, there is nothing to say that the feeling applies across the board.
I can understand about having millions of dollars. There's meaningful freedom that comes with that, but once you get much beyond that I have to tell you, it's the same hamburger.