Wrong! Old Fart was a henpecked husband. Without the intellect of Gecko, he wouldn't have achieved anything. Look at how he whimpered away after GE 2011 when the GRC barrier (probably invented by Gecko) was broken by WP.
U are right in that if Lee Con You was the Prime Minister of Singapore, then Kwa Geok Choo was undoubtedly the first deputy prime minister. SHe accompanied him on many of his foreign visits and wrote many of his speeches. She was his confidant, reflective tool, and hence a very important influence on him. Things like the Women's Charter, family planning stop at 2, etc can all be attributed to her. For most of their lives, she earned more then the husband.
But she is a calculating Peranakan Jew. When they started the law firm of Lee and Lee in 1955, it was a nothing piss ant law firm. Compare to the many larger and established British firms, it was very small player. Made worse by the fact that Con You was practicing labour law which did not pay well, and was under the suspicion of the British Colonial powers. It would not surprise me if one of the main reasons for Con You to get into politics was to drum up business for their law firm. Things went much better then that when he actually won and became PM. At which time, the coffers opened up and Lee and lee became swimming in dough. Starting with all the HDB conveyancing contracts default to them. As well as many govt and stat board legal work and other individuals and companies who want to ingratiate themselves with the PeeM.