SINGAPORE – After more than two decades in the industry, Expand Construction founder Von Lee has a vision: The next generation of physical labourers will not be men, but robots that toil tirelessly in the sun.Their human operators, said Lee, would control them from afar, in an office sheltered from the elements.The proliferation of construction robotics has pushed the sector a step closer to Lee’s dream, and towards changes that could ease Singapore’s reliance on foreign labour, which has been becoming more difficult to recruit and retain.Figures from the Building and Construction Authority (BCA) show that to date, more than…