33k per month take home on 1 million per year would mean the tax rate is over 60%. There is no way that's right.
High W2 income earners are heavily taxed in the US.
45-50% is a better total estimate for a total tax rate.
The last dollar made is taxed at 53% (40% federal, 13% CA), so that's why the 60% number didn't sound horribly off. This is also ignoring FICA and SS taxes, which it's far too late to do the math on :)
Someone earning £1,000,000 in the UK would pay 46% tax.