I think this way of thinking is reductive. There are always going to be people who will abuse the system. You can have all the checks you want, but it's gonna happen anyway. However, these people are a minority. Most people do want to work, and having the ability to rest and recover when they're sick no matter how frequent it may be, means they're doing and feeling much better at work. We shouldn't refuse to implement things that will benefit everyone because a few people might abuse it.