With the high level of unemployment rate, lots of persons aren't interested to investigate if a particular company or business is worth their time, they simply enroll in just to earn a living through the salary stipend offered by an employer who is corrupt also.
Some persons doesn't mind if the place they are working for is simply corrupt or not, all they care is about money. But to cut it short, money isn't everything, we might stay put to earn money but our minds will never be settled down due to how corruption having enclosed the workplace. And with time the worker who love money than making a fine name, will be lured into same corruption others are practicing, which is a problem to the society, making it unsafe for clients to come negotiate business with the owner, because corruption is written over the Manager's forehead too.
The best thing I can do when I found out that the company is corrupt, when the manager isn't ready to re-write the bad image, I'll simply resign to keep my image clean. Than being tagged alongside other corruption minded employees in the company who are simply doing all sort of malicious things to keep their position safe in the company, which is very sinful.