Big Four (audit firms)

So let me first tell you who all are Big Four Audit firms according to WIKIPEDIA "The Big Four are the four largest international professional services networks in accountancy and professional services, offering services including Audit, Assurance, Tax, Consulting, Advisory, Actuarial, Corporate Finance and Legal. They handle the vast majority of audits for publicly traded companies as well as many private companies, creating an oligopoly in auditing large companies. These 4 Firms are PWC,E&Y, KPMG & Deloitte " Now let's talk about how much fair they are in their practices, so as usual when ever I talk such I talk on hindi to avoid beep situation,so please find my view below :