请教一道逻辑题

With the Roadmaker, a crew can repave a mile of decayed road in less time than with the competing model, which is, however, much less expensive. Reduced staffing levels made possible by the Roadmaker eventually compensate for its higher price. Therefore, the Roadmaker is especially advantageous where average wages are low.

为什么结论是反的？ Why it should be
the Roadmaker is especially advantageous where average wages are high?

thank you!!

不是说roadmaker 用less time吗？

而且，后来的high price可以被compensted by 少用的员工

所以工资水平越高就越有优势