What are the reasons for maintaining good employee relations in an organisation?

What are the reasons for maintaining good employee relations in an organisation?
it is compulsory for someone to keep a good image of himher in an organization because we will be happy only when people like us,stay happy with us.we just love it when people expect more from us and it can only happen when we have a good image.in fact,indirectly it encourage us to do more nice work which are good for society,for us.