GumbyDamnIt Corporate model printers are likely to have high capacity inkjet and toner cartridges, which are sold for an even higher premium.
You're right about that. I have a Canon printer with a 13x19 paper capacity (for gallery prints), for which the Canon inks cost nearly $150 a set (10 colors required, not just 4). A similar set from an ink cartridge maker -- not a printer maker -- costs about $36 per set of 10. Ink isn't expensive, and neither are plastic cartridges.
Canon, of course, does all they can legally to "encourage" users to buy their cartridges, including not allowing some of the Canon software and accessories that came with my printer to work at all, if "off brand" inks are used. E.g., the adapter and software needed to print on DVDs. The truth is, the inexpensive inks worked just as well, and caused no harm at all to my printer.
Incidentally, I'm not picking on Canon. HP ink cartridges for my HP all-in-one printer cost a large multiple of the cost of the "off brand" ones that work every bit as well. That printer displays a message on its touch-screen to the effect that non-HP inks are being used. I can live with that.
As I said, all razors.