If we simply removed country caps from the current system then it would be dominated by certain countries with the highest pay difference. The smartest scientist in Germany would be waiting in line behind hundreds of thousands of far-less-skilled programmers from developing countries willing to work for at-or-below market rates (in a hot market where salaries would otherwise be rising faster).
Also, smartest scientist will still get the priority via EB1 instead of lowly engineers who will get the EB3 category. This is already accounted for in the current system. so we are really talking about two lowly engineers in Germany vs India. Do you agree they should have to wait for same amount of years for employment based GC? How about two scientists from China and tiny country of Monaco?
Yes a points system is obviously better but can be manipulated, particularly in developing countries without consistent school quality. As soon as a process to get visas is created it becomes an adversarial game to beat the system. I wouldn't rate their degrees equal. India's "engineering" degrees, for example, in my view are more akin to associate's degrees in engineering technology or such. It's all multiple choice and cramming. Even if we ignore how easy such an approach is to cheat, it doesn't teach them useful skills anyway. So if they were really assessed accurately I wouldn't expect many from India to match graduates from Germany, apart from those who attend school in the west.
China has a lot more solid schools, at least in my area, though a lot of rampant cheating and everything else too.
