I very much agree that's the practical pool of possible coin values.
Seems to me if one wanted to simplify the system, a good solution would be (1, 5, 10, 50). This would really make the math simple.
But I don't think people would give up quarters happily; nor do I think fifty cent pieces would go over well; and I think it's high time to lose pennies. So if I was the evil overlord in charge, I think I'd just drop to (5, 25). Cash transactions would round to the nearest nickel instead of penny. Getting back four nickels instead of two dimes would be gotten used to quickly, I think.
Seems to me if one wanted to simplify the system, a good solution would be (1, 5, 10, 50). This would really make the math simple.
But I don't think people would give up quarters happily; nor do I think fifty cent pieces would go over well; and I think it's high time to lose pennies. So if I was the evil overlord in charge, I think I'd just drop to (5, 25). Cash transactions would round to the nearest nickel instead of penny. Getting back four nickels instead of two dimes would be gotten used to quickly, I think.