What are the most evil Australian companies?

I was wondering what you all consider to be the worst companies currently operating in Australia and why?

I'm not asking about workplace culture but rather about companies whose actions have had the most negative impact on the country

Edit:
Thanks for the responses everyone!

I just want to clarify a few things:

• please add a why - almost everyone skipped this bit
• Political parties themselves don't count
• I can see a lot of replies indicating companies that pay no tax here in Australia. I'm not super interested in this because:
  • its standard practice for most large companies to reduce their income tax liabilities often down to zero
  • if i want a list of those companies I can get it from the ATO website

I want to know about companies that have had a negative impact on the country directly.