If you describe someone as self-serving, you are critical of them because they are only interested in what they can get for themselves.
例句
They suggest that my motives for proposing reform are self-serving and mercenary.他们暗示说我之所以提议改革是贪图金钱,想谋取私利。...corrupt, self-serving politicians.贪污腐败、一心谋私利的政治家们