Even having said that, mitigation is better than continued suffering. To illustrate my point with an extreme example: making it illegal to kill your slave doesn't solve the underlying slavery issue, but hopefully it would stop some slaves from getting murdered, in the meantime.
There is an inherent danger in trying to work within the system to fix it, but we're talking about real people's lives.
I think it's still an open question whether or not raising the minimum wage is the best way to mitigate the problems of the working poor, but I don't think the sky will fall if we get it wrong–it's already wrong, amirite?