US government data reveals unemployment is hovering near its lowest point in decades, hitting 3.7% in June.<br />As a result, fast-food chains across America are desperately trying to hire and retain workers.<br />According to Business Insider, chains are adding new perks to win and keep their employees.<br />Shake Shack is testing a four-day work week, and Chipotle has a new bonus system.<br />McDonald's has launched a service pairing all restaurant employees with free career and academic advising services. <br />
