I think that "everyone should be able to do what they want with their own property", per se, is not a good principle for society. Sometimes people should not be allowed to do what they want with their property. In particular, I think the more property a person has, the less freedom they should have to do what they want with it. (This can also take the form of "the amount of property a person can own should be limited".)

I was speaking in generalities, if that wasn't extremely obvious.

Obviously, yes, people are - and should be - constrained in what they can do with their property. Even the most capitalist systems on earth place restrictions on property. I didn't think it was necessary to caveat that control of private property is not absolute or without consequences. I'm not aware of any capitalist systems that do not put greater protections on people that control large amounts of property (see monopoly, environmental, antitrust, public securities law, etc. Most of those are basically irrelevant to people who don't own large amounts of property).

The point is that for property to mean anything at all, an owner must be allowed to direct the use of that property. What's the point of owning a house if I can't make any decisions about what to do with it. I don't really own a house if I can't decide that I want to live in it, or to sell it.

Yes, but what if you own 100 houses? I'm pretty sure there is some number N of houses (or total value of houses) where I would be fine telling the person, "You don't get to decide what to do with these houses anymore, they're going to be given to people who need houses." Not as a matter of antitrust or monopoly but just directly as a matter of an individual controlling too much wealth.

Aside from that, once you admit that there can be restrictions on property rights, it's unclear how property rights in and of themselves is a steelman of private equity. Why not just say that "you can't sell to private equity" is one of the restrictions? Or, perhaps more subtly, why not say that a private equity company of a certain size is not allowed to buy any additional company, independent of what rights that company's owner has to sell?

There is a lot of stuff you're saying here that sounds simple but isn't.

...once you admit that there can be restrictions on property rights, it's unclear how property rights in and of themselves is a steelman of private equity. Why not just say that "you can't sell to private equity" is one of the restrictions?

What do you think that would look like in practice? Private equity is investment in non-public companies -- the purchase of shares in non-public companies or the purchase of the companies outright. In many cases, the private equity firms themselves are public; but in many cases, they are private, as well.

There isn't a way to make a rule that "you can't sell to private equity" but there can be a rule like "you can't sell a private company at all" or "public investment funds can not purchase shares in private companies" -- if you try a few of the variations that are possible, you'll see that they're all bad rules, I think.

You really have to think about hard about what you mean by "a private equity company". It's not as easy as it looks. If a manufacturing firm starts to buy up suppliers (many of which are small, private entities), is it a private equity company? It's buying up non-public companies.

My point with these arguments is just to say that private property rights are not a steelman for private equity. I'm not saying that these are simple answers to the claim that we need private equity, I'm just saying that the concept of private property is also not a simple answer to the claim that we don't need private equity.

That said, I agree with you to some extent. I think it's not actually so hard to define what I think is bad about private equity, but it's true that that badness is not confined to private equity. In particular I think the distinction between public and private companies is almost entirely meaningless; what we should care about is what companies do, whether they are publicly traded or not. From that perspective private equity is not really different from publicly traded "holding companies" that do basically the same thing.

The crux of it, for me, is companies that are just doing "the business of business", and are not organized around human beings doing things that they genuinely care about and want to do a good job at. You can never run a good company by trying to run "a company", rather than trying to run a steakhouse, or a pet groomer, or a bank, or a car wash, or some particular company that does a particular thing. The problem of both private equity and public "holding companies" is that they value money to the point that they no longer sufficiently value the actual substance of the good or service that the business provides.