I don't think it is. That person earned that right by either earning/buying that much Steem power and holding on to it on the platform. Is it better for that person with a million SP to hang on it it and under use it, even if it's for self votes...or better to sell it on the open market, depreciate Steem value, and then have 1k Steem users buy $1k each and utilize 80% of it while self voting half of that.
I would be curious to know how much voting capacity each user uses on average each month.