Is it obligatory for employees to invite workers to eat with them when they eat at work?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: When my colleagues at work put out food, whether breakfast or otherwise, they do not invite the workers to eat with them, and they look down on doing so. I strongly dislike their doing this, and I have advised them, but they did not heed my advice. What is your guidance for me and for them?

Answer:
Have you heard that it is recommended to invite those present and the workers, and not to eat while they are looking at you? Perhaps they are hungry or in need of food, so you invite them to share with you, or you set aside food specifically for them. The important thing is that you do not leave them out.