> Scamming of gambling addicts is tragic but not detrimental to society.

This isn't true.

  each 10 per cent increase in gambling expenditure in NSW results in more than

    4,500 additional assaults
    2,800 additional home break-ins
    1,300 additional break and enter (non-dwelling) offences
    1,400 additional motor vehicle thefts
    2,300 additional stealing from motor vehicle thefts
    3,800 additional fraud offences each year

> Stock market integrity is important because of their function in the economy

Some might argue that people - including gambling addicts, and those impacted by their addiction - might possibly be more important than one of many possible financial mechanisms for free enterprise.