Complex sentence: Another reason given is that the financial sector vigorously lobbied government to allow financial liberalization because it stood to gain hugely from it whereas the negative impact would be dispersed among all other sectors, with no one sector suffering greatly.
Split into simpler sentences: Another reason given is that the Financial sector stood to gain hugely from financial liberalization and so vigorously lobbied government to allow it. Whereas the negative impact would be dispersed among all other sectors, with no one sector suffering greatly.