Just saying they "contribute" doesn't get the whole point across. They do pay taxes, it's just not visible. Payroll taxes have to be the most ingenious method of hiding taxes from voters ever.
That's a very good point. I should've pointed that out. Another thing that everyone should keep in mind, if your company fails to remit the proper amount of payroll tax (social security and medicare), then it is your responsibility to make up the difference on your 1040. The line for this item is on the second page of the 1040 under the Self-Employment tax.
We're all paying into a system thats falling apart =/..
[1] http://money.cnn.com/2011/04/14/pf/taxes/who_pays_income_tax...