I don't know exactly what IEA's do so I can't really comment one way or another about what would be an appropriate pay grade for them. I can say that what CBP is paid, does not effect what IEA, ICE agents, DOD police or any other job is paid. They are different jobs and have different responsibilities. I can also comment about CBPOs. Way before the merger we were 9's, then someone figured out that we should be 11's, then we merged. Now instead of just needing to know immigration or customs laws we needed to know both. Assuming 11's were the appropriate grade before the merger, then it makes sense that there should have been a grade increase with the increase in responsibility and knowledge, but there wasn't. If the IEA position warrants an 11, then I hope you receive it. I was happy at this agency with an 11 now I'm extremely happy with the 12.
But when a long train of abuses and usurpations, pursuing invariably the same object, evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new guards for their future security.
Translation for the intellectually challenged: If the government screws the people too much, it is the right and duty of the people to revolt and form a new government.