Totally agree, it's not even logical to think that wealthy people couldn't flee the country by means other than via exiting the border crossing, even more logic would tell you that the wealthy have investments and money in offshore accounts as well.
When we want to look at controlling the populace all one has to do is look at the open border issue. Open borders allows those in power access to cheap labor that enables to keep intact substandard wages to keep them dependent on the government and under their control to enrich themselves and feed the globalist agenda.