［英翻中］Many in this city serve at his pleasure.?

Here in Taiwan, if you are a civil servant, you are not abiding by the above rule, but if you are a premier, you serve at president’s pleasure, and if you are a minister, you serve at both president and premier ’s pleasure, it means they (president or premier) can dismiss you at any time. She or he would not even need a reason to fire you. Also, once the president or premier tells you to leave, that is the final word on the subject. No appeal.
In America, I don’t know how many government officials are appointed by their bosses, but just from this sentence, I feel they have many appointed civil service officials compared with Taiwan, they are all serve at their bosses’ pleasure.

故整句可譯為：這個城市中很多人的職務去留完全取決於他個人喜好.

at someone's pleasure意思是「閒著來活」/「待喜歡時才做」/「按喜好而做」，跟pleasure本意「樂意」/「歡愉」是反面語意。
因此這句或許意思是
「這城市的公僕都是隨隨便便(香港語：是是旦旦)的。」
「這城市的公職人員都只是會隨己意辦事。」
兩種可能都可以，要看全文討論或提出這問題所在是控訴他們"沒作為"還是"只顧私利"。但大部份時間用這英語說法都是指對方「優柔寡斷」。

這個城市的許多人都隨他意向性辦事.