"why do you oppose letting them make employment contracts which will make them better off?"

I would argue that those contracts do not make those people better off. People want to work, want to be productive, want to feel like they're not taking charity to feed themselves. So they'll take 3 jobs and try to survive on 5 hours sleep a night to do that, running their health into the ground, because employers will gladly take advantage of people's need to feel productive, while setting them all against each other to drive wages as low as the most desperate person to work will accept.

"The minimum wage, by eliminating low-paying jobs, prevents low-skilled people from getting started with employment."

Huh? First, minimum-wage jobs generally are "low-paying, low-skilled" jobs. Are you saying that restaurants would prefer to employ a new dish-washer at $7.25/hr if they'd previously been... catching rats bare-handed for $2/hr? Also, how do you account for the fact that low-skilled people manage to find low-paying jobs in countries that have better minimum wages than the US?

"Not only are you against allowing people to contract, you also want to deport people who exercise their right to speak. This is not a cheap shot."

Um, yes, it is.

"When you are willing to violate a basic human right like the freedom to contract, you're likely morally blind enough to be willing to violate other human rights."

Such as, the freedom to contract yourself into slavery? Or the freedom to contact buying food and/or medicine from a supplier who has not been subjected to any FDA checks because they assure you that you can trust them that they don't need any of that gub'mint interferin'?

The US already puts limits on the kinds of contacts that people can enter into, especially with large corporations, because they realise that there is a great imbalance at work. Corporations have a lot of incentive to fuck people over if they can get away with it, and a highly concentrated amount of expertise, time, and effort to put into doing their best to make that happen. While individuals are often inexpert in many fields, and do not have the time - even if they have relevant expertise - to push back against every corporation they deal with day-to-day, and the effort they expend doing so is disproportionate to the amount of benefit they personally will receive. Individuals' efforts are diffuse compared to those of a company, even more so when compared to the efforts of many companies trying to accomplish a goal together, like drive wages down.

The US also even has limits on speech, where speech can cause an immediate and direct threat to the safety of others.

I would argue that it is not moral blindness to limit the rights of some, where the exercise of those rights affects the wellbeing of others. Yes, limiting rights is dangerous, but I would argue that that simply means that it needs to be done carefully, in persuit of a specific goal, and only as much as appears to be necessary to achieve that goal - with the acknowledgement that it not be done at all if the goal appears unattainable; not that is must not be done ever.

No-one's rights are absolute, they always start get fuzzy when the exercise thereof starts to interfere with the wellbeing of others. Your right to swing your fist ends at my nose.

"Instead, government restricts the supply of taxis making taxis expensive and relatively scarce."

Yeah, I'm totally with you on the taxis thing.