While the simulator is fun for buying gold bars and yachts, the real-world Bill Gates uses his money for systemic change through the Bill & Melinda Gates Foundation. If you were in his shoes, your "spending" would look like an attempt to rewrite human history.
You could hand out a top-of-the-line MacBook Pro to every single person in New York City and Los Angeles. Solving Global Problems use bill gates money
If you are looking for a "solid paper" related to the concept of "spending Bill Gates' money," you are likely looking for one of two things: While the simulator is fun for buying gold