Question: My brain cells seem to be dying but this one is bothering me. What is the phrase that means something that you lose in process? Similar to occupational hazard? Or by product or side effect?

Example:

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> Poor people and animals are ———- of capitalism.
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So *poor people* and *animals* are the subject and *capitalism* is the process.

Answer: 
Consider *fallout*.

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> **fallout** *noun*
>  2 The adverse results of a situation or action.
>  ‘The prosecutors must also consider the possible negative economic fallout that likely will result at a time when the economy is already struggling.’
>  [- ODO](https://en.oxforddictionaries.com/definition/fallout)
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Your example would look like this (though it doesn't fit very well in that particular example):

* Poor people and animals are *the fallout* of capitalism.
Victim? or maybe casualty? Something that is badly affected by a situation.