The problem with America is people who don't know much about what they're talking about, but give their commentary anyway.
We have a progressive tax structure; if you're lucky enough to have made it to the next tax bracket, only 3% more of your income is being taxed -- not even close to the BS being spewed upon here. In other words, a driver with nearly 8 more hours OT is paying $20-$30 (depending on the state) more in taxes off his nearly $400 gain.
Keep in mind that payroll checks hold taxes as a convenience. UPS and its payroll company has no idea what your year-end taxable income will be, thus a percentage of your check is withheld based upon the income earned and claimed dependents. If you made $100 one week, literally a few bucks will be withheld. If you made $3000, nearly half your paycheck may be withheld. Ultimately when you return your tax form, it will correct itself.[/quotes as trying to quote YOUR post