I disagree with the approach to just say "this all sucks". It sucks in particular ways, but I do agree with the other comment that this system has gotten humanity this far, so there are certain benefits to it. I hope in the future we'll have better systems than money to be able to allocate resources.
So we need to understand why part of it sucks, why part of it is great, and develop better alternatives that are also great but suck less. For example, it is important to keep track of who owes what to whom, otherwise people can't trust each other to make promises on a large scale with strangers. It's less good that people can gain a lot of profit simply by manipulating numbers and moving financial instruments around. Part of this stems from all value judgements being collapsed down into a single number which of course can never be self-consistent [1], part of it stems from informational differences between actors and other real-world deviations away from what a "perfectly-liquid" market should look like. If financial activity was truly a "market optimisation" mechanism, we ought to be able to replace the entire thing with a neutral algorithm and get rid of bankers and personal profits here completely.
[1] you cannot totally-order a 2-vector (and in general a n-vector) so that the ordering obeys the neighbourhood principle
So we need to understand why part of it sucks, why part of it is great, and develop better alternatives that are also great but suck less. For example, it is important to keep track of who owes what to whom, otherwise people can't trust each other to make promises on a large scale with strangers. It's less good that people can gain a lot of profit simply by manipulating numbers and moving financial instruments around. Part of this stems from all value judgements being collapsed down into a single number which of course can never be self-consistent [1], part of it stems from informational differences between actors and other real-world deviations away from what a "perfectly-liquid" market should look like. If financial activity was truly a "market optimisation" mechanism, we ought to be able to replace the entire thing with a neutral algorithm and get rid of bankers and personal profits here completely.
[1] you cannot totally-order a 2-vector (and in general a n-vector) so that the ordering obeys the neighbourhood principle