[iso1210]

In the UK, someone on £80k ($105k) will pay £25k ($33k) in tax. That includes healthcare

In the US, someone on that amount in Denver will pay $29k in tax.

That's not an extraordinary difference, even before you factor in health care costs.

[jbms]

It's an extraordinary difference when you look at what proportion of engineers (outside of London/Finance) earn £80k in the UK vs $105k in Denver.

[iso1210]

That isn't a tax thing though - payroll/income taxes are roughly the same.