Once you start grouping people into big lumps like &quot;student&quot; and &quot;old&quot;, it opens up a rat&#x27;s nest of unfairness. What about disabled people who aren&#x27;t old? What about old people who are very rich and healthy? Etc. I think we have to tolerate a bit of unfairness so that a large chunk of needy people can benefit, even if a few outliers miss our or are unfairly advantaged.