"The break for these “master limited partnerships” will cost taxpayers about $1.5 billion from October 2010 through September 2015, Congress’s Joint Committee on Taxation estimated last January."
Savings of $1.5b over 5 years? Not worth the effort, imo, especially considering that the US needs investment in energy infrastructure with the shale boom. MLP structure has been very successful in encouraging investment in energy infrastructure. Why would they sabotage that for $1.5b over 5 years which is miniscule compared to the size of the debt?