That's too naive. Laws work differently once you have billions of dollars. They can and will be bent and politicians will be too happy to do that for you. It's win win for both.

Ignoring this aspect of the way the world works is living in a fantasy world, no less fantastic than a communist utopia.

Oh! I chose my word poorly. Streaming is very much "tangible" in the sense I had intended. "No regret transaction" is perhaps a better term than tangible, for the notion I am trying poorly to capture.

Let's take Walter Bright. I would love him to be a billionaire if he isn't one already. He made many delightful "goods", (to entertain oneself with and also to pay one's bills writing programs in a language so pleasant *). No party in the transaction would regret such a transaction, even in hindsight.

There are legal ways to accumulate wealth, however, without exchanging any goods and services. For example, HFT (ought to be called low latency rather than high frequency), speculation on the stock marketd. Derivative markets, for example, are zero sum, for one to win someone else has to lose. The wealth accumulated by such means has not been created, merely redistributed.

* Wish more companies used D though, so that it's actually feasible to earn your keep writing in D.