This is clever, but it is unlikely his motivation is to microscopically increase demand for Teslas by having Tesla's white-collar workforce commute more.

It is much more likely that he earnestly believes that the trade-offs for Tesla organization favor a fully on-site office workforce, knowing that will drive away some excellent team members.

(It's hard to argue with Tesla's success; but it seems to me the future more broadly is away from on-site office workforces... even and especially at companies doing well.)

For a man that has been investigated by the SEC for tanking his own companies stock price with a few tweets, it's hard to imaging someone accusing him of having ulterior motives for the sole purpose of increasing his wealth. I certainly don't know him personally, but outward evidence would suggest to me that your comments implications are without merit.