How to improve the company's culture where all the employees are insecure about their job?

Hello Dear HR folks, I have a small query about the company's culture. How to improve the company's culture where all the employees are insecure about their job. What should be done to improve the company's culture?

Dear Sapna,
In your post, you have shared your problem of employees feeling insecure about their job. However, the question arises is why do they feel insecure? Is it COVID pandemic induced insecurity or the insecurity arising out of on-spot termination by the management? There has to be some reason. Please confirm to us the reason for the insecurity. The solution can be offered once we know the complete facts.
By the way, your primary query is on changing the company's culture. However, the company's culture is always shaped by the top leadership. Therefore, please confirm what is your designation and whether do you have sufficient authority to bring the change in the organisation's culture.
Thanks,
Dinesh Divekar

Hello Sapna,
Mr. Dinesh has raised the right concern, please highlight the same to get better response on your query.
Moreover, in case the insecurity is because of COVID, please refer the below link.
Motivation Strategies During Pandemic
(https://hradminist.com/motivation-during-pandemic/)