Referees decisions, do we need cameras?

Following this weekends football I feel that something really needs to be done about the decisions the referees are giving.
For example Robert Huths red card yesterday was absoloutley shocking. I could not believe it when I saw it. I think that cameras in the good would really help situations like this. Some refs may not even give a yellow card for them decisions but then other ref like yesterday has.
What are you views on cameras into the game?

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