They can recognise their efforts, show respect to them, tell them how important they are for the company, give them suitable salaries , training , promotion and any other benefits.

Appreciating their efforts, showing respect, as well as, telling them how important their work is for the company. Moreover, giving them several benefits like a proper salary, training, promotion possibilities and so on.

By appreciating their efforts, showing respect for them and of course letting them know how important they are for the company by giving them suitable salaries, training, promotion and other perks.