Not that it in any way justifies Yamaha's prices, but Ketron seems to be doing the same thing...
you want it, you buy it.
Unfortunately, they are are selling a product that isn't quite finished.

Perhaps Roland arrangers will benefit from these actions, Lord knows they need it.

Come to think of it, neither Roland and Korg have anything new on offer, the E-series is apparently still intact and supported, and PA2xPro/PA-800 are upgraded as far as they'll go, so these companies should be reducing their prices accordingly.
Certainly a different strategy for a company to raise prices during an economic downturn...maybe they know something the others do not.