Perhaps. I think it's more about the passport ranking so one can travel and also the salary bump. But even if more of the other government services, try living in a country where if you get into a serious car accident you have to pay cash at the ER before they treat you. Scrambling to find multiple thousands of dollars in cash at 3am sometimes. (This happened to my friend in Kenya)
Im not sure if I can blame people for wanting to have more financial or medical security.
I think a very low percentage of migrants do it so that they can get a better passport for traveling. Sure, there are people who do that also.
Is it legal to let people suffer or even die at the ER on Kenya if they don’t happen to carry a few k$?