I always liked (and still like) the works of Jheronimous Bosch. 500 years ago he was a visionary who searched for the boundaries between reality and religion, between social acceptance and exclusion. In that light I find the thematic of the exposition fitting and interesting. I also know some of the works of van Lieshout. I always found van Lieshout an excellent architect. As an Artist in the true sense of the word, he rather invents meaning then distill it in his works.
Unfortunately, after reading the article on the exposition I'm afraid the reference to WWII is too far fetched and the whole body of art would be much much stronger had van Lieshout concentrated on the essence of the title SlaveCity.
He could instead have addressed the slavery and reduction of mankind to part of the global economy more directly and controversely by relating it to media consume and how this reduces humans to "less-then-individuals" as well as "glass puppets" which could be seen as assets to the advertisement industry instead of linking back to historic events. It would, in my opinion, have given the installation a far stronger message.
With that in mind, I really like how strong your image is with the lady that looks at her smartphone where she could instead look at the installation in front of her, the drinking couple and the outsiders. Your image conveys the message better then the explanation van Lieshout gives in your article

(Interesting observation, the man on the left wears his keys the same way I do. Note to self: Fix holes in jeans' pockets so I can wear my keys inside the pockets again)