When some people accumulate enough wealth, they become empowered enough to make a difference in the history of man. Some ( like Gates ) are using their resources in a way which will benefit humanity, others will go out and buy all the rental property they can.
I am hoping so badly ( hoping, mind you, not really anticipating ) that our lawmakers in Congress will see and craft tax law to encourage the kind of stuff Gates is doing and closing all of these tax advantages of simply rent-seeking and financial churning.
If Gates gets favorable tax treatments for doing this kind of stuff, it only empowers him to do more similar things as well as lead others to use the power of their wealth in a similar manner.
If there is one thing Gates has demonstrated over and over, he does have the leadership, organizational, and business skills to do it.
I know I have left lots of anti-Microsoft rants here: I feel hypocritical in posting this. Those rants were my venting my frustration as an older guy about software becoming so un-necessarily complex with all these special interest groups trying to get their proprietary add-ons adopted into Windows that pranksters have started having a heyday leaving a mess in everyone's machine. I was rooting for a very simple but thoroughly understood OS that was pretty damned bulletproof. My feeling was if pranksters thought setting people's fancy little outhouses on fire, then what I wanted was a simple one made out of cinder block.