a) Income Taxes -- Here's the comparison of taxes on $100k in income: http://i.imgur.com/GR9czuF.png - USA has the 53rd highest effective rate. $100k too low? We actually move down to 55th if you look at the same chart for $300k in income: http://i.imgur.com/2hb7iuB.jpg
b) Corporate Taxes -- Some of the lowest effective rates in the OECD: http://i.imgur.com/ZdPCL9C.jpg
c) Estate Taxes -- "We pay 50%" -- No 'we' don't. The tax doesn't apply at all if you leave your money to a spouse, farms and other small businesses are exempt as assets, only assets over $5.3 million have any tax applied at all, and the rate is 40%. $5M estate when you die? Tax rate = 0%. $6M estate? Tax rate = 4.7%.
d) Tax enforcement is strict? Come on. The vast majority of tax cases ended up with the 'guilty' party settling and paying back taxes. A few end up with penalties on top (most penalties are negotiated away for prompt payment). The only people imprisoned are those willfully engaging in tax fraud.
2. High earner tax rates -- This is so wrong. High earner rates are at the same level they were in the 80's and 90's: http://i.imgur.com/fklDml0.png --- But most importantly, the '1%er' incomes have risen dramatically. If we were in a truly progressive tax system, shouldn't tax rates increase as incomes do?
3. Make sure you're comparing apples to apples.. the OECD and Heritage (who are no fan of taxes and would have every incentive to make the US look worse) show a completely different story than the one you're providing: http://en.wikipedia.org/wiki/List_of_countries_by_tax_revenu...
They show the US at 26.9% of GDP for 2012, Canada at 32.2%, the UK at 39.0%, and France at 44.6%. If you've ever spent time in any of those countries, you'd surely see how absurd it sounds to indicate that we're taxed more than they are.
As for 'We're only 5 points lower than the UK'. Even if that was true, only 5 points would mean almost a trillion dollars in additional tax.