Having lived in both the UK and the USA last I checked the average wage in the USA is over $37,000 with the average house price just around $200,000
In the UK the average wage is £23,000 and average house prices are just over £200,000.
Now taxes, thats a whole new story.
Sales tax
The UK has a 17% VAT(value added tax, IE sales tax)
The US has a national rate of 5%. Each state can add a % onto this and then again each county can add another %. I want to say average sales tax is around 6%
Income taxes and property taxes.
The UK has nationalized healthcare which consumes roughly 20% of your gross wage. There is also pensions coming out which is some more, then another tax that goes for general government spending. Add those up for someone making under £44,000 it's close to or over 30% of your money gone before it hits the bank. I believe it's $44,000 for the next tax bracket. There is also Council tax for home owners which is about £1200 a year depending on where you live so thats another 5% gone from your wages.
The US has a lower national tax rate and healthcare is privatized so you don't pay as much out of your wages. (IE the company you work for spends money for your wellbeing) Property taxes are around ?$4,000? now? I cannot remember off the top of my head.
There are many more things involved but if you add up all the different taxes the average worker in the UK is having 1/2 their money taken away in tax before they are handed the keys to their new car while in the states it's closer to 35-40%. This gives people in the states a better percentage of their wage for 'stuff' they also make double so the actual amount to spend on 'stuff' is double that of a UK person.