But seriously, this sort of thing is hard coded into the game, and BW/EE need to worry about a long laundry list of other things before worrying about something this.
Plus, people buy ore NOT to hide how rich they are, but in order to protect that wealth from major/grand dineros that can make 10% of your cash disappear at the drop of a hat! That, and there is an upper limit to how many credits you can actually have.
Also, part of the reason the markets are always empty (on RT) is because of price controls combined with the hyper-inflationary environment that is RT. So if you really want to fix things on RT, there should be an upper limit to how much cash you can actually lose from a major or grand dinero, combined with a removal of the credit limit. Then you would increase the maximum price of minerals along with removing (or significantly increasing) the amount of time stuff can stay on the market (until the empire pulls it off the market).
But again, all these things require changes to the hard code, which takes time and effort. So if you got coding skillz and time to devote to a project, by all means contact BW and EE.