It's risky to comment without knowing the specifics of Joel's situation. But it seems that his $158k salary isn't outside those bounds if he lives in e.g. San Francisco or NYC. Hard to know someone's living expenses without drilling way into their personal financials, and again this is not unreasonably high.
Thiel, from the link you posted:
>> What’s the average salary for CEOs from funded startups? Thiel was hesitant to answer, but eventually said “$100-125k.”
That was in 2008. Adjust for rent inflation, and that should square the numbers for you.