Design vs. engineering question

[Alaskan Son]

There is another thing to consider. I charge up to $50/hr. All of the engineers I have worked with charge over $100/hr. Why would I want my client to pay over $100/hr for work that I can do? The less the engineer has to do the more money I save my client. Am I taking money away from an engineer? So far they appreciate the work that I do, it saves them time and makes their job easier.

Good observation. This is the main reason I asked the question in the first place.