And once again, someone confuses macroeconomics with microeconomics.

The issue isn't that one can't make gil once they hit 50. The issue is that the number of gil fountains is being outweighed by the number of gil sinks. This creates a deflationary effect which, at the moment, is not being felt as bad because of people going through the main story which gives a gil bomb that doesn't happen again.

Really, understand the argument before you go around refuting it.