On the topic of repeat bidding, look at Sydney 2000. Sydney was the third Australian city to submit a consecutive bid, so while Sydney itself had never previously hosted or bidded they utilized experience and knowledge gained from Brisbane '92 and Melbourne '96 and the nations desire to host to their advantage.
The USOC does not have to put up the same city three or four times to win as the USOC has access to a wealth of cities capable of hosting. The USOC can bid with a different city and still gain experience from those bids and prove even more so I think that the whole nation wants the games, and not just one city or region.
With regards to the kind of longterm planning a good Olympics require, Paris is already onboard. Next year or later this year (hopefully a local can correct the date) Paris will begin work on the Grand Paris plan. This massive infrastructure project will increase housing, improve roads, expand the metro to connect the Ile de France better, and improve the existing metro, not to mention countless other projects that will have the French Capital looking its best in 2024 with or without the games. This is a plan already approved and being implemented by the city, and it's the kind of plan that marries well with an Olympic Bid. Paris can easily bundle all of it up and come 2024 be an amazing host.
It's that kind of longterm planning that any future US city must have. The games should be something that can easily bunddled up with a greater plan for the city. Not only because you can then group public funds not under the Olympic banner, but the civic improvement one, but also because it itself becomes an insurance policy that there is a post games plan that will only continue to improve the city.