I agree with Booklady that eating the 'main' meal at dinnertime in the U.S. could be why we have such weight issues. For me, I do not like eating a big meal and then going to sleep because I wake up feeling HORRIBLE! The siesta would not work well for me.
I hope the people in Spain are provided a choice for what hours they want to work. Some still enjoy the long lunch hour, and some would prefer a shortened one.

I recently negotiated the best hours possible for me here at work. 10 hour work day from Monday thru Thursday , with Friday, Saturday, Sunday off. So, I don't get to see my daughter as much as I'd like on those 4 workdays, if at all, but I have a three day weekend every week. You can't beat that....in my opinion.