Pop Art-a school of art that emerged in the United Kingdom in the 1950s and became prevalent in the United States and the United Kingdom in the 1960s; it imitated the techniques of commercial art (as the soup cans of Andy Warhol) and the styles of popular culture and the mass media.
Medicare wages are the gross wages less the health and dental deductions. Taxable wages are gross wages less health dental 401/457 PERS and other retirement deductions. Not sure what social security wages are... social security wages are not always the same as medicare.
Your employer must deduct these taxes even if you do not expect to qualify for social security or Medicare benefits. In general, U.S. social security and Medicare taxes apply to payments of wages for services performed as an employee in the United States, regardless of the citizenship or residence of either the employee or the employer. In limited situations, these taxes apply to wages for services performed outside the United States. Your employer should be able to tell you if social security and Medicare taxes apply to your wages. You cannot make voluntary social security payments if no taxes are due. Refund of Taxes Withheld in Error