Do people making less than 150k buy 100k cars? I don't have a good sense for how Americans budget their vehicle purchases.
The real killer here though is the limit. If you're making $160k, that $7000 is still a real incentive. Can you afford it without, sure, but if we're trying to incentivize EVs then everyone should get the incentive... sometimes wealthy people are wealthy because they save money whenever possible, so the incentive will still move the needle on EV adoption.
All numbers subject to change!
I was visiting my hometown where houses are 200k and lots of households make 100k-200k/yr. All the driveways were full of new trucks, SUVs, and boats.