It is a world wide general/approved/accepted rule that Principal/Head master of any institution must be M.Ed so that he/she should have well defined knowledge about the basic/fundamental/primary concepts about formal education. Even in countries like Japan, Thailand, Singapore, Taiwan including advanced countries USA, UK, France, Germany, etc only M.Ed degree holders are recruited for the positions of Principals.
M.Phil & P.hD degrees are purely asked at University level and research work however if a person is M.Phil or P.hD holder in Education, he/she is preferred over M.Ed. These are the basic concepts to improve the quality/quantity/standards of education in any part of the world but here in Sindh we saw IBA recruited Head masters merely on the basis of B.Ed even some candidates were MBA/BBA holders among the selected ones.
Now to what extent they will improve education without having sufficient knowledge regarding educational concepts? You better understand than me.
What happens now a days is actually copy-paste type of work means what you see the latest trends just apply them without going into details and depths.

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Those who wait they get. (Own Creation)