Why doesn't the boiling point of an aqueous solution depend on intermolecular attraction?
GOOD QUESTION! That is the nastiest p-chem question I've seen.  Atkins, Physical Chemistry 2nd edition (the readable one), pp 228-232pp.  Boiling point elevation is presented as purely an entropy effect, given two assumptions:  

1) The solute is non-volatile. 
2) The non-volatile solute does not dissolve in the solid solvent. 
Both assumptions are explored in Chapter 10.

A solute increases the entropy of the solution but does not change the entropy of the vapor at a given P and T.  A higher T is then necessary to give the same entropy difference.  I am not satisfied that this wholly addresses a strongly interactive solute versus a non-interactive solute versus a strongly negatively interactive solute,

http://www1.lsbu.ac.uk/water/kosmos.html 
Kosmotropes and chaotropes

http://www.amazon.com/Physical-Chemistry-Peter-Atkins/dp/1429218126 
Atkins 9th edition is current. 
"There is almost no chemical concept that Atkins can't make unnecessarily confusing"
http://www.amazon.com/Physical-Chemistry-A-Molecular-Approach/dp/0935702997/ref=zg_bs_16052591_2 
Library - it's pricey. 
http://www.amazon.com/Thermodynamics-Engineering-Approach-Yunus-Cengel/dp/0073398179/ref=dp_ob_title_bk 
Library - it's very pricey.