You want to know what's outrageously expensive, yet equally important for basic ability to function in the workplace and other situations? Hearing aids. Hearing aids are glasses for your ears. But compared to them, glasses are unbelievably dirt cheap, and basically fully covered by a lot of decent company insurance plans. Hearing aids? Not the case. Imagine if glasses cost $2-3000 per lens. PER LENS. And your company…
I will add, that getting access to the frequency curve adjustment software for each device is difficult (everybody needs a different adjustment curve and other params tweaked), prohibited and also expensive. They are often set incorrectly in the first instance and require repeat visits to an audiologist and tweaking.
So much so that I've been considering at all sorts of dodgy routes to getting control of this myself, including reverse engineering and ordering device-coupling hardware from shady non-western web sites, so that I can program them myself.
I'm really really hoping that this market will be disrupted soon, but I'm not holding my breath.