As implied by the name, "working holidays" allow tourists to earn money for their travel expenditures and their daily needs while traveling. In other words, it lets them work hard, so they can play hard.
「打工度假」，顧名思義就是允許觀光客在旅遊地以「邊玩邊工作」的方式，賺取旅費來支付生活所需。