Some Muslims don't employ other Muslims because they pray while working and it will affect the work but employ kuffaar (unbelievers) because they do not pray while working so they do more work.

It is a very serious matter to regard the Muslims’ prayer as something objectionable and to employ kuffaar (unbelievers) because they do not pray.

Whatever happened to faith and piety? Whatever happened to fear of Allaah? How can a Muslim criticize his Muslim brothers for praying? We should fear Allaah with the work we do in this

Life, we must not let the work be a means for us to be punished in the Hereafter. What would our gain be if we work in this Life and we gain bountifully but we lose Paradise in the Hereafter?

May Almighty Allaah forgive our shortcomings and accept our deeds as an act of worship.
«Abu Mardiy Kewdirôrun At-thaqoofiy»

True, one of our shop tenants is doing the same thing but am not 100% sure anyways