You're already participating in such a project. Every government currency is inflationary, their value trends towards zero over time. This is by design. Capitalists want you to spend that money as soon as possible instead of amassing vast amounts of it. They punish currency holders with inflation. If you don't spend the money or lend it out so others can spend it, the money loses part of its value. They want people spending and consuming constantly in order for the world to keep turning.
"Change their behavior" is quite the understatement.
All this causes is a massive amount of busywork just to have a shot at maintaining the value of your previous work. This is not necessary for a good economy, not to mention all the externalities it creates.
> Capitalists want you to spend that money as soon as possible instead of amassing vast amounts of it
No, capitalists want your money to be productive. You don't have to spend your money, though that is an option, you have many other options for what to do with your money.
> you have many other options for what to do with your money
That's what I meant by "or lend it out so others can spend it". That's what all those options come down to. Money cannot just sit in someone's accounts doing nothing, it must either be spent or given to someone else who will spend it: loans, investments.
"Change their behavior" is quite the understatement.