You're not following their plan very closely if you think it stops at millionaires. Do you think the electric companies strung lines out to the poor's houses first? Nope. If you'd listen to Musk's plan, it's to sell at high price in low quantity, then mid price at mid quantity, then low price at high quantity. This takes several decades to achieve.
RE: Elon Musk Gets Largest CEO Pay Package (Ever?) For Running Tesla Into Ground