Your statement is unfair.
Qutb does not say that these are new 'pillars of Islaam.'
The Prophet (saw) did say that "Islaam is built on five" and then named the five things that you mentioned.
The Prophet (saw) also made thousands of other statements. In the words of God in the Qur'aan and in all the statements of the Prophet (saw) which are inspired by God, there are many many evidences to back up the principles enunicated here by Qutb.
If you really doubt this I could start listing them.
With all due respect, I find it difficult to be unfair to a man who would argue that I do not have control of my animalistic desires merely because I don't share his faith.
Yes, I know the Prophet said thousands of things -- you might be interested in this post on the reliability of some of those sayings.