A failsafe system won't boost the cost of oil much at all, if any, because the oil companies make enough money to offset the costs. Shortages will boost the cost of oil. We don't produce much of what we use. We do refine much of what we use. The damages here (and this is catastrophic imo) will be to the fishing industry, the restaurant industry, the loss of sea life, the loss of beaches and tourism, and probably in the Gulf coast real estate/business sectors. That being said, if I ran or owned an oil drilling or refining company, you can be damn sure I would take every safeguard possible.
I'm all for clean and alternative, but it will not be less expensive, and it won't be more efficient. If we ever really truly go clean and green, regular people like you and me will have to accept a less luxurious and more sensible lifestyle. The problem with Americans is that we want to have everything, but we don't want to give up anything. I can. Can you?