The problem with that approach, is it also destroys the network. You can never revoke the bribery once it becomes a core component of how the system functions and what drives it. The hyper contributor actions on the platform, which always make up a very large share of total contribution, ultimately drifts toward maximizing the gain of tokens and away from creating / contributing content solely based on quality.

Simply put, the quality of contribution when monetary consideration isn't the primary, is going to be higher.