In order to provide effective solutions to these problems, one must have a high understanding of the underlying core factors. To achieve this understanding, training in economics, specifically microeconomics and macroeconomics, is required.
Not everyone can do this though, not everyone has the skill or the will to be an economist so I don't think that what you're saying is a realistic one since there's no way that everyone can be an economists, what they ought to know is how the supply and demand works and they're good to go.
It's not about if everyone can do this or not, But the option of opting for economics should be given to the students, they should know about taxes and other financial related stuff.
If they don't then it's likely that at some point someone will take advantage of them now knowing a thing or two about economics and how it works.
In other words, you don't know about financial stuff then you're at the mercy of people who know how to bend the things around that field.