There's no easy way of attributing value to invention. Does the inventor / automator really deserve all of the profit that would come from such automation for all of eternity?
What if another person was only 2 months behind in making the same invention? And 2 months after that, a 3rd person was destined to, and within 2 years, the idea would be so obvious that the top 5 percentile of that profession would have been able to come up with the same thing? Why should the first person / company to automate something deserve an eternal monopoly on the output of said automation?