These "unethical people seeking to get rich" could also outsource all jobs to third world countries and get their work done pennies on the dollar -- yet a lot of them don't. It doesn't look good for your company when you take advantage of people in plain sight.
The "third-world countries" equivalent would be: if third-world labor were cost effective, then people would be hiring labor in third-world countries and crushing the competition with their greater productivity per dollar, and getting rich in the process.
Which is exactly what happened over the past 30 or so years.
