> The problem isn't (always) giving a lot of change, it's being able to verify that the larger bills are genuine. That should be fixed by changing the bills' d

> The problem isn't (always) giving a lot of change, it's being able to verify that the larger bills are genuine. That should be fixed by changing the bills' design to be more resistant to counterfeiting, not by effectively making them useless because nobody accepts them anymore due to rampant fraud. Most currencies in developed countries don't have this weird counterfeiting problem that the US dollar apparently has when it comes to higher-valued denominations (with "higher" apparently starting at 50$), so that's some evidence that there must be a lot of room for improvement.