Currently on Skyblock Oasis, there are players with Billions of $$. I feel that limiting the income from jobs (aka the only real income besides spawners) to $7500/minute (if it even manages to work properly) is rather extreme.
I propose 3 solutions:
1) open the jobs shop and allow players to buy limit increases (if the plug-in allows this)
2) remove the money limit or increase it 10x+
3) decrease the money limits timer to 5-10 seconds