The phrase "pillars on which" is grammatically correct and can be used in written English.
It is generally used to refer to systems or structures that provide support or serve as the foundation for something else. For example, you could say: "The principles of democracy are the pillars on which our society is built."
It is one of the pillars on which our craft is built.
"That is one of the pillars on which Germany has based its policy approach".
On their return to Cuba in November 1965, Che wrote of Dreke in his report to Fidel: "He was... one of the pillars on which I relied.
Even as his health slipped, he remained dedicated to the work of the commission, Ms. Sooka said, because he believed that it was "one of the pillars on which democracy was built in our country".
Freedom of ideas is one of the pillars on which the greatness of America is founded and which allowed us to flourish as a world leader in science and medicine.
"John's relentless pursuit of accountability and high professional standards has been one of the pillars on which public trust in the free press of this country has been built".
It is important to note that one of the pillars on which the strike hangs is the Paris climate accord globally endorsed in 2015 at the 21st conference of parties of the United Nations Framework Convention on Climate Change.
The provision of health care is supposed to be one of the pillars on which the party's legitimacy is based.In this section One and only one Limping along Gotcha Back into the fold Xi Jinping's progression Pax Sinica ReprintsYet the health-care system, like the state-dominated economy, is limping.
The large-scale late romantic symphony was to become one of the pillars on which his reputation was established, and launched his last Mahler series in Lucerne; two others followed in the shape of a contemporary opera – Giacomo Manzoni's Nuclear Death – and Bellini's I Capuleti e I Montecchi, both of which he subsequently conducted at La Scala.
Podhoretz recalls that for Cohen, the postwar preservation of Jewish culture was of importance not simply for the Jews' own sake, but because the failure to preserve that culture "would rob the country of one of the pillars on which it rested".
