In the new study, two experiments using the well-known "trolley dilemma" tested the hypothesis that when faced with moral choices in a foreign language, people are more likely to respond with a utilitarian approach that is less emotional.
The researchers collected data from people in the U.S., Spain, Korea, France and Israel. Across all populations, more participants selected the utilitarian choice -- to save five by killing one -- when the dilemmas were presented in the foreign language than when they did the problem in their native tongue.
The article:
http://www.sciencedaily.com/releases/2014/04/140428120659.htm
The publication:
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0094842
I don't think that either Esperanto or Lojban is the perfect language. Expressing an idea in either of those languages usually takes 1.5 the amount of time as it does in English.
I think there room for a new constructed language that does things better.
In this case it would be a feature, not a bug.