What is the exact reason for such a big backlog ? My theory is that the backlog is mostly a double edged sword. If the backlog turned to zero today, the Universities would flood with applications from around the world and the number of I140s would increase exponentially in the next 10 years. The backlog hence keeps expectations in check. I know plenty of friends on I140s who may not get a green card for the next deca…
On a more personal note, I feel this is part of the west trying maintain cultural and racial superiority.. but that is just my opinion.