I don't think Jupiter leads to a lack of ethics or consciousness..
Mercury-Jupiter actually suggests a conscious or philosophical approach to life. And a major exaggeration. The speech will be large and wide.
To me this person might have speech or mental problems. The 8th house is debts, along with Mercury being a detriment in Pisces and conjunct Chiron and Saturn. It suggests that this person has poor or lack of communication. There could be a speech impediment of some kind.
With the square from Jupiter, there's a feeling that this person has a lot of to say, but it's lost on people. On top of that, Jupiter in Gemini (being in its detriment), their philosophical or moral approach to things will probably be lacking or not make any sense.
With Jupiter in the 11th and Mercury in the 8th, with these planets square to each other, and Mercury being the ruler of the 11th, and Jupiter being the ruler of the 8th, there's a really serious issue or interplay going on between these areas of life.
The 11th house could generate lots of friendships, or lots bad friendships only for them to be lost anyway. Or they take on a kind of debt energy with the 8th house. Friends might be draining rather than rewarding. Maybe this person is a bad investor or accountant and when dealing with his/her friends' money or resources ends up losing all of their money or miscalculating it.