It's called market segmentation, and that by itself isn't a "scandal".
Component prices drop by about 30 percent per year, or in half every 2 years, and flash storage prices have followed that trend exactly (you can Google the iPad or iPhone build of materials from over the years, and see I'm right).
This isn't about component pricing. It is about profit margins for the whole product line not each individual tier. Apple is using the drop in cost for one component to offset the increased cost of others to maintain their profit margin.