Death by sub-clauses, change of tense and jargon

Below is a quote from a book I’m reading. If anybody can tell me wtf it means please comment below:

Thus, it is altogether clear that a corporate governance framework that is not consistent with the social and economic requirement of non-listed companies will yield imperfections over time and would not achieve the legal strategies to control agency problems and reduce transaction costs.

- McCahery & Vermeulen, Corporate Governance of Non-Listed Companies (OUP, 2008)