It is very misleading statement to say that"Tanzania has high illiteracy rate", Tanzania is among the countries in Africa with good literacy rate, the fact that Kenya has slightly high literacy rate compared to Tanzania, doesn't mean that Tanzania has very high illiteracy.
For example, 2012 Tanzania adult literacy was 67.8%, Kenya(2014), adult literacy was 74%
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Back to Magufuli leadership style, it is very dangerous for a leader who has been elected democratically not to follow constitution of the country, it doesn' t matter how good the leader is. People decided to lay down laws and regulations which stipulate how they want to live and be governed, then they gave these laws and regulations to one person whom they have entrusted to guide him/her, then out of the blue, the person decides to choose which ones out of those laws to abide with and which ones to neglect, that is wrong and unacceptable.