The revolution in "Moon is a Harsh Mistress" cannot succeed without the aid of the supercomputer. That makes any moral philosophy implicit in that revolution questionable to the extent one asserts that the moral philosophy is true of humanity now.

To a lesser extend, "Starship Troopers" asserts that military service is a reliable way of screening for the kinds of moral qualities (like mental discipline) that make one trustworthy enough to be a high government official (or even to vote, if I recall correctly). In reality, those moral qualities are very thin on the ground in the real world, being much less common than suggested by the book. If the appropriate moral qualities were really that frequent, the sanity line would already be much high than it is.