It's an outrage that so much public money should have been wasted in this way.

outrage 是名词，由前缀 out-（表示"超出"）和 rage（愤怒）组成，字面意思是"超出一般的愤怒"，指"令人极度愤怒的行为或事件"或"义愤"。这个词强调对不公正或不当行为的强烈愤怒反应。