新加坡和韩国等基础设施搞得最好的国家并不是以孤立的观点来思考项目；他们考量每个基础设施项目能为政策目标提供怎样的支持，并与其他可能产生更好回报的项目进行权衡比较。
Top-performing countries such as Singapore and South Korea do not consider projects in isolation; they consider how each supports their policy objectives, and they weigh it against other projects that might yield better returns.