There will always be poor and rich people, it's how everything works, even in real life.
For instance I have just under 50k, but Miner_Man123456 has got over a million or two, including the money in his town bank, and then you have the regular guests coming on.
The lottery plugin would be fun, sad, frustrating and something to look forward to at the end of the week
. Seriously, having something at the end of the week is brilliant!
[EDIT]: Fixed silly mistakes/typos.. Tired.