Or: weeding out everyone who believes forms and bureaucracy shouldn't constitute a significant fraction of one's mental landscape, or who is offended by the extent to which the difficulty of the process makes it seem like the government doesn't want you here in the first place, or whose opportunities in other countries are close enough in attractiveness for the annoyance to tip the scale (presumably precisely the people you should most try to attract).

Though "weeding out" or "filtering" to any real extent clearly isn't all that much of a priority when a large part of the system is a lottery.