Why is that: "When In Public Service, Do For Others Before Doing For Oneself!"?

As in case of Government or other public services, such as the authorities of national railways and public utilities (undertakings that supply water, gas, electricity, tram and bus services,etc.), these organizations will be required and follow the regulations and obligations to act legally for the sake of the people. Yip

當在做公共服務時在考慮自己前應先考慮大眾