salary sacrifice
n.— «The vouchers can be used to pay for care for children up to the age of 16. To receive the vouchers parents must apply to make what is called a “salary sacrifice.” While this sounds painful all it means is they agree to give up some of their weekly wage or monthly salary in return for vouchers.» —“Making sacrifices for little Louis or Louisa” MoneyExpert (Newton-le-Willows, United Kingdom) May 20, 2008. (source: Double-Tongued Dictionary)