Some points:
1. The badness in LKY was already evident from his activities during the Japanese Occupation, which must be known amongst the populace at the time of the 1950s and 60s when he was but one of many aspiring politicians, hence the need to explain them away (clumsily) in his book.
2. Truly incorruptible person would reject extra egg for his char kway teow when he knows that the only reason why he is given that freebie is because he is the Prime Minister, a public SERVANT. Such an incorruptible person most certainly would not sue for defamation when the extra egg turned out to be expensive apartments bought at discount not accorded to any Tom, Dick or Harry.
3. Good people (assuming that someone who worked for the Kempeitei during the Japanese Occupation can be called such) can become bad over time.
4. The price of freedom is eternal vigilance, the below extract from Book I, Chapter XLVI of Machiavelli's Discourses on Livy is instructive.
5. I am so glad that I have the foresight to see what sort of citizen LKY is and UPGRADED for my own good.
6. LKY used every trick in the book to ensure that institutions which existed in democratic countries, which would have checked his power and the dangers that it brings to the freedom of the citizenry, are NOT allowed to strive in Sinkieland. Therefore, he is BAD for Sinkieland.
"............ in what way men jump from one ambition to another, and how very true is that sentence which Sallust placed in the mouth of Caesar,
That all evil examples have their origin in good beginnings. Those ambitious Citizens ((as was said before)) who live in a Republic seek in the first instance not to be able to be harmed, not only by private (citizens), but even by the Magistrates: in order to do this, they seek friendships, and to acquire them either by apparently honest means, or by supplying them money or defending them from the powerful: and
as this seems virtuous, everyone is easily deceived and no one takes any remedy against this, until he, persevering without hindrance, becomes of a kind whom the Citizen fear, and the Magistrates treat with consideration. And when he has risen to that rank, and his greatness not having been obviated at the beginning, it finally comes to be most dangerous in attempting to pit oneself against him, for the reasons which I mentioned above concerning the dangers involved in abating an evil which has already grown much in a City;
so that the matter in the end is reduced to this, that you need either to seek to extinguish it with the hazard of sudden ruin, or by allowing it to go on, enter into manifest servitude, unless death or some accident frees you from him. For when the Citizens and the Magistrates come to the above mentioned limits and become afraid to offend him and his friends, it will not take much effort afterwards to make them judge and offend according to his will. Whence a Republic, among its institutions, ought to have these, to see that its Citizens under an aura of good are not able to do evil, and that they should acquire that reputation which does good and not harm to liberty, as will be discussed by us in its proper place."
http://www.constitution.org/mac/disclivy1.htm#1:45