Answer: Pension contributions.
Life insurance premiums
Union dues.
Step-by-step explanation:
The employee is the one who decides if they want to pay Pension contributions, Life insurance premiums or Union dues as these are considered Voluntary deductions meaning that they have to elect for them to be subtracted from gross pay for it to actually happen. If they do not wish for them to be deducted it is their own prerogative.
Medicare Taxes and Social Security Taxes are however mandatory and have to be paid from employee salary.