if god were to give in abundance to his creatures they would fill the earth with oppression. so he gives according to measure as he will. he knows his creatures. he is allaware and allseeing.
ولو بسط الله الرزق لعباده لبغوا في الأرض ولكن ينزل بقدر ما يشاء إنه بعباده خبير بصير