Why did he call for a radical restructuring of French society?

Question: Why did Abbe Sieyes call for a radical restructuring of French society? Are his views more reflective of the concerns of the First Estate or the Third Estate?

Explanation:

Emmanuel-Joseph Sieyes was a legitimate philosopher who occupied a dynamic part in the "French Revolution." He was commonly recognized as "Abbe." He named for a radical restructuring of the French society because he claimed that the noble individuals were duplicitous and that they troubled the middle class (Bourgeoisie) and the farmers.  The Bourgeoisie and the farmers were portion of the Third Estate, thus his opinions were extra worried on this cluster of individuals. He was able to outline the frustrations and complaints of the Third Estate and this, somehow, fueled the French Revolution. He wanted sovereignty to be placed in the hands of people who were primary contributors to public service, such as the Third Estate and not the aristocrats.

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