Obviously, I would have many, many little bank accounts, managed separately and in parallel, under many different identities.

I believe that this would severely limit your financial throughput. You would be able to buy lots of little things, whose total cost is quite significant -- for example, you could buy yourself a million cheap PCs, each costing $1000. But you would not be able to buy a single expensive thing (at least, not without exposing yourself to instant retribution), such as a satellite costing $1e9.