With that in mind, you can design a system so that it's lenient - allowing more people to pass through it, including those that shouldn't - or so that it's strict - preventing anyone who has even the slightest whiff of dodginess from achieving success.
How would you design yours?
I would rather have a welfare system that
(In real life, of course, getting down to an "extra payouts of 0%" probably means that more than 5% wouldn't get their money. And vice versa. The closer to "perfection" you get, the harder it becomes to move that extra step.)
Context: Thinking about this comment.