That's mega-fail argument. Here's why:
If the minimum cost of living for a single person is $X, then that person should be paid $X. Otherwise, the taxpayers have to pay that person welfare benefits just to keep him alive, sheltered, and fed. Why should taxpayers foot the bill? Paying wages is the employer's job.
I'm a business owner. My business is a services company, so most of my employees are well paid. I do have two employees who get government assistance. Here's the thing. I pay them both what they are worth to me, and I doubt either could get another job paying what I pay them.
So what would be your thought where we go from here?
1) I voluntarily raise their pay and pay them what they are not worth? This isn't going to happen.
2) Government forces me to raise their pay. I will fire them both, they aren't worth what it would cost for them to live without government assistance. If I paid more, I could expand both jobs and give them other tasks that the people I have doing them now can't do. I am OK with what they do for what I pay them.
3) You admit that maybe you don't know what you are talking about and it's better they have a job they can partially support themselves than they live entirely on government assistance.
What say you?