Your "bakery" question could be simple. If the person being hired would have to make deliveries by car or truck, their baking skills are not an issue. Many restaurants in my area have hired extra people for food delivery. If the person with no skills is going to be a baker, the hiring person must think they can teach someone what skills they need. On-Job Training, or OJT as we call it.
As to your complaint about exploitation, we will ALWAYS have stronger and weaker people. No two people are alike. And as far as somehow trying to control corporations, we run into the age-old philosophical problem for which the appropriate quote is attributed to Roman philosopher Juvenal (late 1st century/early 2nd century AD): "Quis custodiet ipsos custodies"? Or... Who watches the watchers?
On a more mundane level, we had a case in New Orleans a couple of years ago where a construction company took some shortcuts that lead to the collapse of a new hotel they were building. The folks who were tasked with building inspections - who would be a type of watchman for obedience to building codes - didn't do their jobs because they were given incentive to look the other way. This is a case where NO ONE was watching the watcher and 3 people died in the collapse. The criminal and political ramifications are still ongoing.
This example is meant to convey a point. I hear your argument - but how do you propose to hold corporations in check when they have their hooks in the people who would monitor and control them? Or if they don't have those people in pocket now, how long do you think it will take? This is the way of the world. Do you know the old joke (not necessarily funny) about how fast you have to run to escape being eaten by a lion? The answer is, faster than the slowest hunter in your group. There will always be faster and slower, stronger and weaker, smarter and dumber, and that is because we reproduce by random genetic selection, not by cloning (that would make us all identical.) So... what do you propose as a solution?
Remember that people get tired of that constant vigilance. The Roman Empire faded because of it. Our philosopher friend Juvenal had this to say about government that has population participation: “The people that once bestowed commands, consulships, legions, and all else, now concerns itself no more, and longs eagerly for just two things: bread and circuses!”