Would like you to follow up with this question:

Is your knowledge more valuable than your time?

As an example

Two Civil Engineering Consultants are asked to submit a report on how to solve an infrastructure repair problem. Both are being paid by the hour.

Engineer A - Spends 72 hours researching the problem and preparing a detailed report of his analysis. At $100/billable hour = $7200

Engineer B - Submits a 2-page report detailing the solution which is based on a similar problem she resolved just last year. It took her 2 hours to prepare the report. At $100/billable hour=$200

Both solutions are valid and feasible.