Your offer is impossible to implement. If you assume this, then most likely you think that there are some objective, well-established criteria by which you can distinguish high-quality post. But it`s not. Merit is an absolutely subjective assessment. There`re no conditional arrangements among the participants about whom and for what to give merits. Even merit-sources act at their discretion. Therefore, this estimate remains unpredictable. How do you propose to enter such unforeseen data into a computer and create a program? It just won`t be able to calculate all possible situations where a post can be regarded as constructive and useful.