I want a karma whore beanie now
Although this is an interesting idea, it still has a problem.
Whenever you set a limit, people will always make it there, and then what?
Working with rom/rot muds in the past, I found this to be the biggest issue. What do people do when they attain the highest level?
The solution (if you care to know) is to not give people experience levels, but to just give them a set of skills. These skills atrophy when not used, and increase when practiced. That way, to stay at the top skill, they need to be practicing everyday. And to be good in several skills requires a good deal of work everyday....
Ok, this journal entry is pointless, but I'll post it anyway.