He owns 13%. Still significant, of course. But it’s very unlikely he’d sell them just for payback, since that would massively impact his own wealth. https://www.investopedia.com/articles/insights/052616/top-4-tesla-shareholders-tsla.asp

If wages rise in conjunction, I don’t see any issue. The theory is that slight inflation encourages putting money to use, either by consuming it or saving in a bank account (where the bank can lend it out) or investing it etc. That’s why some inflation is generally considered desirable.