Low interest rates - who benefits, rich or poor?
https://www.bundesbank.de/Redaktion/EN/Downloads/Publications/Monthly_Report_Articles/2016/2016_09_effects.pdf?__blob=publicationFile

That should fit your question. 

Imho we have never seen these kind of interest rates, and It will be very entertaining to see how this works out. 

Could lead to another black swan event, which is nothing you can calculate/prepare for.