Yes people will get millions sooner or later, that's expected. However a wipe allows us to completely revamp the economy to keep this from happening so soon, wipe passive money making all together, and get rid of all the "stale" cash and houses being held by inactive players, etc etc.
If you want the truth, in my opinion a wipe would allow the server to recover from the ungodly amount of cash Slick pumped into the economy. The economy was stable until his patches. It's like clipping a dead limb off of a flower just for it to grow back healthier. Think of it that way mr @Michael L