i have not researched it enough. it was more of a curiosity look into a program that regularly crops up in my readings.
my initial questions are:

how long has it been happening?
what is the rationale behind it?
how much is spent on it?
how do you measure if it is successful?
who is profiting?
are there opposing viewpoints? what alternative solutions are there?
is the program now an industry that will be hard to stop even if it no longer fit for purpose?

yes, definitely complicated!