It Amazes’ me as to how the modern architects think theses days, they have spend millions to build this building and never thought of a equipment to automatically wash these windows. Instead they send these poor staff with probably very minimum wage to do all that dangerous job.
Short of labour is not the point, and in U.S.A. there are already window cleaning equipment has been designed for sky scrapers. The point is that a lot of modern Architects are non thinkers, and you can see example of it in any large City in U.K. that you cant clean some windows because of difficult access.