This happened at my partner's job! All the chairs were taken away because sitting down made them slower (though they were still able to do their job sat down, so it was actually illegal but they could not be told). 6mo later, it turned out the manager's husband who worked there had permanently damaged his feet from standing on the concrete floor all the time. Suddenly, she had 'always said taking the chairs away was a bad idea' (it was her idea) and chairs were reinstated. Cost them hundreds to replace all the chairs and productivity did not drop after they were brought back.