Sure, there are 150K to 200K salaried software engineers that do hands on architecture and dev but they are few and far between. Those are the upper crust and there aren't that many of them, and they only command those types of salaries in areas of the country where the cost of living is high.
You said "any engineer worth his salt is making $100 to $300/hr", and discussed that in terms of engineers developing software. That averages $200/hr, and $400K/year salaried, and frankly, no-one, not even the upper-crust is making that kind of money working on product software. Not without being part owner, and not unless you consider some options program or something.
As for Tom Knoll, he invented the program, so of course he is rich. But he is one guy, just like Larry Elison and Bill Gates. There are legions of developers that work on the products spawned by individuals and they don't make it big.
Anyone outside of Redmond and Silicon Valley areas making "significantly" over $100K, salaried and in a dev/architecture role should consider themselves doing really well.
My bro is one of those such architects working for Autodesk. I am one of those such design engineers working for a VOD company. Sure, there was a time when I made that kind of money (mid $100K), salaried, but that was several years ago, before the "corrections".
The demand is still good for such highly skilled individuals. But the gold rush is over I am afraid.
Good talking with ya!