[DennisR]

If you do not have exemptions at the bottom (which I would recommend), you do not need to worry about that. If you make $100 a year, you send in $10. If you make a million, you send in $100,000. The reason you make everyone pay taxes is because you appreciate things more when you have to pay for them. Everyone benefits from defense, roads, and so forth, so everyone should contribute.

[The_Expatriate]

Everyone benefits from defense, roads, and so forth, so everyone should contribute.

No, not everyone. What about the millions of us expatriate Americans? Why must we pay for infrastructure and services from which we do not benefit...on top of paying taxes in the countries in which we are resident?