I really wish I had written this post but Kelly Phillips Erb (Taxgirl) did. So I'll share her post instead. Kelly shows us what we in the US are paying in taxes and how that compares to other countries. It might be an eye opener for you.
I see this all the time. A client will be complaining about how much they are paying in taxes until I point out both their marginal rate (the highest rate they are taxed at) and their effective rate (the average of all their rates) and the rates turn out to be much lower than they assumed.
I covered how marginal and effective tax rates are computed last year. Voting Tax Rates.