Answer-
1.Often the companies are focused on generating profits and results.Hence individual may be forced to be forced to act unethically.
2.The individual may become ambitious and follow unethical path in order to receive recognition from the management.
3.The workers may be forced to be a good deal.Therefore he may lie or mislead the other party in order to seal the deal.
4.The policies are inconsistent and vague with regard to moral conduct.
5.Organisational culture is determined by the best practices of the top level managers is immoral,then the lower level management no longer remains motivated to be honest.