Actually, the going rate for discovery is much lower than that. There are external firms that hire people to process discovery documents - I work for one and it's the worst job I've ever had. People at this company get paid $13 an hour to prepare, scan, and index documents into a database that the actual attorneys can browse at their leisure. As an actual example from my company (which they've explicitly told me not to post in addition to the fact that I should never, ever post anything online so they can fuck right off):
My company does discovery processing for the Blue Cross/Blue Shield network of insurance companies. We get handed thousands of boxes full of paperwork dating back to the early 90s and get told to process everything. A lot of the crap - things like lunch menus, copies of publicly-released promotional material, handwritten notes about the office's Secret Santa pool - gets weeded out at this level so that no one needs to bother to look at it. I've personally seen an entire folder full of printed copies of emails that were less than five words each, something like "This is okay" or "Send back for revision" and another that contained nothing but press releases in Chinese from a firm that Blue Cross either partnered with or was considering partnering with ten-plus years ago.
Honestly, just from a common-sense perspective, 75% of the stuff we scan is so non-controversial that it is highly unlikely that it would ever appear as discovery in a lawsuit and there's really no reason that someone couldn't have just thrown it out years ago. I highly doubt that a potential insurance lawsuit is going to request copies of lunch menus from 2001 when they have the full meeting agenda available.
The workers where I am are treated like garbage. Mandatory 12-hour days to meet deadlines are common (I actually just got home from one two hours ago) and losing contracts even moreso. The pay is low, the managers are assholes, and I'm quitting in two weeks so I can try to get any job that isn't this one.