We had a glyco shortage as well, but our pharmacy has found a supplier, so the vials are trickling in for now.
IMO the shortage isn't a scandal, it's simply contract manufacturers and the pharm companies trying to run a profitable business. How profitable they need to be is another debate.
It's very costly to produce parenteral injections while meeting strict FDA requirements. While some drugs are more costly to produce than others in terms of manufacturing (lyophilized vs solution vs raw material costs) many of the costs are fixed leading to varying profit margins between drugs. It doesn't make sense from a business perspective to waste manufacturing time and labor to produce a drug with a slim profit margin. Now if you're one of the few manufacturers that produces a drug with a small profit margin, you could potentially make up for the small profit by selling higher volumes as you'd likely have a larger market share. In some cases of drug shortages, there might be only a few manufacturers of a particular drug. If a batch gets contaminated or put on hold for QA assessment at an individual plant, it can lead to shortages as the other manufactures can't make up for the sudden increase in demand.
There are multiple other factors that play into drug shortages, but supply and demand is a big one. If there is a demand for a highly profitable drug, it behooves the manufacturer to devote more resources to ensuring the supply meets the demand than to waste resources on less profitable drugs. Whether or not that is ethical is up for debate.