Which means that Allah permits lesser corruption! Am I wrong?
My Response: Allah permits us to purify or corrupt ourselves, and we are promised justice and recompense in the Hereafter.
However, in this world, when human corruption tends to upset the Balance, corrective measures are taken to restore it. Messengers warn the people, and after being given enough time to repent and reform, divine punishment is executed.
MSA asked: "However, in this world, when human corruption tends to upset the Balance, corrective measures are taken to restore it."
Allah waits for humans to upset the "Balance," and when it becomes "extremes, only then He reacts. Is it not what you are telling us and others as well?
My Response: This world is a place of trial to establish who are worthy of the Gardens (Jan-naat). In this world, we are given freedom of choice within certain limits. However, when our foolishness exceeds to a point where it aims to make humans extinct, divine intervention becomes necessary. Its a Most Merciful Lord to whom we owe gratitude for making it possible to live a life in this world, and it is He who lovingly invites us to earn His forgiveness and blessings for an eternity of bliss in the Gardens that are promised:
Extract from http://signsandscience.blogspot.com/2014/10/creation.html :
Size of the Garden
The reward will vary in accordance with the quality of faith and actions of each individual, as indicated in the size of the gardens mentioned in 57:21 and 3:133, and as stated in 8:4 below. For those who believe and seek forgiveness for their sins, God will grace them with a garden as extensive as heaven [singular] and the earth, while those who also keep their duty to God, the pious, the reward will be greater: as extensive as the heavens [plural] and the earth.
[Al-Qur’an Chapter 57:21, Translator: Shakir] Hasten to forgiveness from your Lord and to a garden the extensiveness of which is as the extensiveness of the heaven and the earth; it is prepared for those who believe in Allah and His messengers; that is the grace of Allah: He gives it to whom He pleases, and Allah is the Lord of mighty grace.
[Al-Qur’an Chapter 3:133, Translator: Shakir] And hasten to forgiveness from your Lord; and a Garden, the extensiveness of which is (as) the heavens and the earth, it is prepared for those who guard (against evil)
[Al-Qur’an Chapter 8:4, Translator: Shakir] These are the believers in truth; they shall have from their Lord exalted grades and forgiveness and an honorable sustenance.