were allah to take humans to task because of what they have earned he would not leave any living being on its back. but he respites them until a specified time and when their time comes for allah has been watching his servants.
ولو يؤاخذ الله الناس بما كسبوا ما ترك على ظهرها من دابة ولكن يؤخرهم إلى أجل مسمى فإذا جاء أجلهم فإن الله كان بعباده بصيرا