I am from Europe and this is a completely ludicrous and false statement. If anything I would expect my USA counterparts to get way more salary after tax each month simply for the ridiculous taxes I am paying here (48%) plus we are paying some more taxes on ANYTHING we buy including food and water.
There is, however, a big difference between spending mentality - most Europeans shy away from going deep into debt and will typically only take loans on housing and cars but not to spend on luxury and entertainment; we by and large don't have that culture of ver-spending is ok and then keep shifting the debt from credit card to credit card. Matter of fact, I don't even know if VISA here would let me do that more than once...