make fish of one and fowl of the other(The contract calls for new hires to be paid less permanently. But why make fish of one and fowl of the other? – Контракт предусматривает, что новым сотрудникам будут платить меньше на постоянной основе. Но зачем такие двойные стандарты?Taras)
work both sides of the street(The real estate agent was known for working both sides of the street, advising first the buyer and then the seller. Val_Ships)