As I write this, the entire 'unanswered' page is 'relieving letter' questions, two of them authored by 'Community'. Are there really so many distinct, non-duplicate, questions on this subject?
I'd never heard of relieving letters before the topic started showing up here. But that's westerner's bias, I think; in some parts of the world this is apparently a very big deal, such that people cannot legally start a new job without being able to produce these letters from prior employers. Think of it as a reference check with a really, really big stick attached (backed by law, even).
I took a quick look at the eight unanswered questions, and none jumped out as duplicates to me. I haven't read them closely; if you think there are duplicates there, please link to them here on this meta post so we can get input from people who are more experienced with this topic.
Stack Exchange supports what are called "long tail" questions, ones that are hard or obscure that might take a while to get answers. Naturally, such questions will hang out on the "unanswered" list. I suspect that we have relatively few users here who know this topic, and that's probably why the list is so skewed. If a question is unanswerable it should be closed, but if it's merely unanswered because the right person hasn't come along yet to answer it, that's not a problem.
If you're feeling overwhelmed by the "relieving letter" questions, you could apply the same solution I have: Adjust your interest filters to suppress anything tagged "relieving-letter" (or maybe "india").
I've done that with a number of tags which suggest that the question is going to be one I really can't respond usefully to, and it does help. The questions aren't hidden completely, but they're greyed out so you know you'll probably want to avoid them.