that's not entirely correct. money may play a role... but they answered to a question regarding voice acting in a live letter back in 2014. that was about hildibrand quests, but i guess it's mostly true for other cut scenes as well:
they are working on the scenes until short before the patch releases and simply don't have the time to voice act them (in all the different languages).
http://forum.square-enix.com/ffxiv/t...ce#post2018791 (the word "voice" is highlighted, just scroll down and you will find it)