There are countries with excellent state of public economy. Their currencies may be strong. The GNP reflecting profits may show monetary growth. At the same time poverty and all forms of illfare increase in the community. The importance of money in monetary communities decreases also because of technical developement.
Banknotes are easy to be forged.
According to general opinion accounting systems are nowadays realiable. Quite the contrary. The advanced computer technics makes doctoring the books especially easy at all levels. Sums can be removed or changed by pressing a button. Even old saved files can be easily manipulated afterwards.