@The existing system already strikes a balance between large and small holders by restricting the number of consecutive pos blocks a single wallet is allowed to create.

If you implement more aggressive curve for this sistem ( restricting the number of consecutive pos blocks a single wallet), then in result you will reach breakpoint to stimulate the corresponding number of 24hour runing wallets.

Major problem of pos, compared to mining is that POS is more reward for rich, and small or nothing for small, this is reason why all pos coins suffer, insufficiently willing people to run wallets