Driving that $150,000 car is a good thing. At the very least they don't hoard all their money.
You can look at it as mere circulation of money. And let's be clear, this is circulation of money, not redistribution of wealth (as they are merely exchanging one asset for another at market rate)
Alternatively, you could see it as this individual making a decision about what humanity should do with scarce resources.
Should we direct them towards helping those in need, or to manufacturing luxury automobiles?
With great wealth comes great responsibility.
A less tongue in cheeck answer: they usually don't invest more than half their savings.
Source: http://www.financialsamurai.com/why-the-rich-hoard-so-much-c...