Why don't people indent C++ access specifiers/case statements?

Question

I often see stuff like this:

class SomeClass {
public:
    void someMethod();
private:
    int someMember;
};

This seems totally unnatural

Answer 1

Imagine such a class definition:

class SomeClass {
    void ImplicitlyPrivateMethod();
public:
    void someMethod();
private:
    int someMember;
};

With the style of indentation you propose, one would need to change this into

class SomeClass {
        void ImplicitlyPrivateMethod();
    public:
        void someMethod();
    private:
        int someMember;
};

(which looks not so nice to many people, especially if the "implicit" section is long enough).

---

I personally prefer half-indentation of such specifiers:

class SomeClass {
    void ImplicitlyPrivateMethod();
  public:
    void someMethod();
  private:
    int someMember;
};

But this is a matter of personal taste.