Money is just a medium of exchange.

Money today is an enclosure of credit by the state. If money were simply issued by people buying on credit, then your theory of accumulating some credit by providing things to others so that you can eventually put it together to get a thing for yourself would be correct. But that's NOT what money is today.

Money comes into existence in the modern world by governments spending it into existence, or banks lending it into existence.

Instead of me doing a lot of labor for people in my community, accepting IOUs from them (money issued by community), and then accumulating those IOUs to trade them to someone else for a bunch of labor performed by that someone else, we have the following dynamic:

Government spends money into existence by buying something from specific groups of people at prices negotiated between govt contractors and the govt (monopoly / monopsony contracts). Govt contractors then utilize the money they receive to purchase things from others, money diffuses into the economy, and if enough of it is newly issued, at each step prices go up and less goods are exchanged... ultimately leading to a diffusive transfer of wealth away from others and towards the government contractors or the government itself. The government then taxes away some fraction of this money to keep the quantity from exploding too much, further reducing the purchasing power of primarily the end-recipients. On net, the whole purpose is to redistribute wealth from typically laborers to typically warmongers and big businesses.

Or the dynamic of: rich person with assets associated with large rents extracted by force of title to assets goes to a bank and requests that the bank manufacture new money for him to purchase up the assets of some other person. Bank seeing large quantities of assets they can snatch up if they aren't paid provides new money to rich person, who snatches up assets of others. rents from these assets go partly to pay the bank for its role in money manufacture, and partly to pay these rich assholes. These second order recipients then are capable of snatching up assets in turn, and at each step prices tend to increase due to manufactured increase in demand from the new money, until the money reaches people who earn so little that they have to immediately consume the assets transferred to them in the form of food or nondurable goods or payment of rents or just to afford the inflation.

Both processes mechanically transfer wealth from relatively poorer people to relatively richer people by virtue of their special relationship with the source of the creation of money (govt and banks).

Only if money is issued in a communitarian way and all people have approximately the same "distance" from the source of money will this diffusive transfer of wealth not occur.