OK, where did the learned scholars get the idea that Muslims should behave like this?
From scriptures like Qur'an 4.34:
“Men have authority over women because Allah has made the one superior to the other, and because they spend their wealth to maintain them. Good women are obedient. They guard their unseen parts because Allah has guarded them. As for those from whom you fear disobedience, admonish them and send them to beds apart and beat them.”
the authoritative Hadith, Sahih Muslim 2127, which was narrated by Aisha (the girl who married Muhammad when she was 6 and with whom he consummated the marriage when she was nine): "[Muhammad] 'struck me on the chest which caused me pain, and then said: Did you think that Allah and His Apostle would deal unjustly with you?'"
Sahih Bukhari Volume 7, Book 72, Number 715:
Rifa'a divorced his wife whereupon 'AbdurRahman bin Az-Zubair Al-Qurazi married her. 'Aisha said that the lady (came), wearing a green veil (and complained to her (Aisha) of her husband and showed her a green spot on her skin caused by beating). It was the habit of ladies to support each other, so when Allah's Apostle came, 'Aisha said, "I have not seen any woman suffering as much as the believing women. Look! Her skin is greener than her clothes!"
ISLAMABAD: The Council of Islamic Ideology (CII) has proposed its own women protection bill, recommending ‘a light beating’ for the wife if she defies the husband.
The 20-member CII is a constitutional body which gives recommendations to parliament regarding Islamic laws. However, parliament is not bound to consider its recommendations.
CII rules women’s protection law ‘un-Islamic’
The bill was drafted after the CII rejected Punjab’s controversial Protection of Women against Violence Act (PPWA) 2015 terming it un-Islamic. The CII will now forward its proposed bill to the Punjab Assembly.
The council has proposed that a husband should be allowed to ‘lightly’ beat his wife if she defies his commands and refuses to dress up as per his desires; turns down demand of intercourse without any religious excuse or does not take bath after intercourse or menstrual periods.
It has suggested that a beating is also permissible if a woman does not observe Hijab; interacts with strangers; speaks loud enough that she can easily be heard by strangers; and provides monetary support to people without taking consent of her spouse.
There is more in the article.
Note that many Pakistani Muslims are unhappy about this. It is however, in accordance with Sharia. Again, Muslims are not the problem, Sharia Law - the heart and soul of historic, orthodox Islam - is the problem.