Businesses won't simply relinquish profit margins just because Congress decides to increase the minimum wage. They'll just raise their prices to pass the cost along to the consumer, who will continue to pay the newly raised prices because there will be that many more people making more money.
I can't say that you are absolutely wrong about this. Eventually, yes... prices will rise, inflation will happen, cost of living goes up, and the raise in the MW contributed to that. But what has happened the last 82 years is sort of akin to a heroin addiction. We increase the MW and for a short time, people
are better off. They have more money in their pocket. But then, they buy more stuff and eventually the stuff gets too expensive again and they are back where they were before. Time for another "fix" because it's an addiction. It's killing you but no one cares. Gotta chase that high.
All it ultimately has done is increase prices and eliminate jobs as well as the ability of the individual to negotiate the price of his/her labor.
There is another hidden aspect that no one wants to discuss... Having a set MW is somewhat of a psychological barrier if you think about it.
You and I view a job as, say... a cashier... as a typical MW job... worth $
x hr. We've already established the
"fair market value" of that job before considering anything more. Okay, what if the job is not subject to this arbitrary MW we've set? There is no preconceived idea as to the value because one
hasn't been established... therefore, the aspects of value are open to definition by the parties involved. Maybe the cashier job happens to be in a rich area where there is a shortage of menial laborers who want to be cashiers? The value would be worth considerably more than the MW because of supply and demand. BUT... since we have already
pre-established that a cashier is a MW job, we accept it as such and the capitalist does as well.
And this works it's way up the ladder. Some jobs pay slightly better than MW... but we've established their value on the basis of this arbitrary wage we've set... it may not apply to the aspects of value for any particular job. I remember as a 22-year old, taking a "promotion" to store manager... I thought it was awesome... I made about $40 a week more but soon found out that I worked about 20 hrs a week more, with far more responsibility. I also gave up an almost guaranteed commission bonus for an almost impossible store sales bonus that I never got because they gave me a crappy store. So you see, I totally screwed myself but I thought I had achieved something great... all based on this artificial baseline set by government and not on the free market value of my labor and the aspects of the job I did. I accepted that... hey, that's what store managers make because that's what they said... it's more than I was making, or so I thought.