Does this law include taxes like Social Security? Many people think they only pay 7.5% and the company pays the other 7.5% but this is wrong. The employee pay

Does this law include taxes like Social Security? Many people think they only pay 7.5% and the company pays the other 7.5% but this is wrong. The employee pays the whole 15%, they just don't see it come out of their check. Does that count as a "hidden fee?" What about VAT taxes?