Big role for money in this 2012 election

Two weeks before the presidential election, TV was flooded with super pac ads, some were for Obama, others for Romney.
Did you remember the propistion 37 in California? Citizens of this state had to say if they were agree, just to label food with GMO. Unfortunately, this propistion didn't pass. The opposition of this proposition, say the big food brands, spent a million dollar a day in advertisings the week before the election to deter  you to vote for this proposition.
Lobbying groups are not only in the US. Why eventually the EU dismissed his law for flight companies to acquire carbon property rights? Lobbying...