Currently, there's no inflation calculation whatsoever in the rules. So you're right, if nothing changes you'll only be able to withdraw $1000 in 2065. Doesn't matter if inflation has been rampant and fast food workers make $500/hour. Of course things could change, but given how much more complex this would make things, I wouldn't hold my breath. Not reimbursing yourself immediately is kind of a hack already, after all.
However, remember that after age 65, the withdrawal rules are the same as an IRA (not subject to the health expenses requirement).