There was a survey on the political stance of Singaporeans:

"While almost half of Singaporeans were somewhat undecided on their political position, nearly a third leaned towards the left, outnumbering the one-fifth who preferred right-wing politics, a survey has found."

The approach of LKY and the other founders has (historically) been pragmatic. LKY actually started out more left-wing. It was in a sense practical, pragmatic, and a response to a colonial government. However over time, and when the PAP became the ruling party, the tactics of the opposition became irrelevant, and the PAP had to learn how to govern and to use the tactics of the ruling party. And divested itself of the sackcloth of the opposition.

And as the ruling party, the PAP had to adopt policies that WORKED for Singapore, and to abandon frivolous and impractical ideologies. And the touchstone of the PAP government has been to ask, "does it work?" and "would this work better?"