I am inferring from your message that some other freelance devs are less conscience-driven than you are. Perhaps that's not what you intended to imply with your

I am inferring from your message that some other freelance devs are less conscience-driven than you are. Perhaps that's not what you intended to imply with your statement "my conscience wont allow me..." If that was your intention though, imagine if another freelance dev has performed justifiable calculations that determine their 3 hours of work should be billed at 2.5x your 3 hour rate. How could they possibly compete with you? What if the deliverable was the same? What if the other devs just billed on deliverable instead of hours with strong renegotiation clauses? Would that be more acceptable to you than playing games with the hours just to get passed bean counters?