Cheap oil is most definitely running out, it's the entire premise on why it's economically feasible to extract fossil fuels from crazy expenses sources like deep water and fracking and tar sands. If there were enough cheap stuff like the kinds found in Saudi Arabia or old Texas wells then someone trying to extract from deep water wells or tar sands would be nuts and bankrupt because it wouldn't make any profit at all.
It's kinda interesting to think how long we can keep this going....we run out of cheaper sources, so we move on to more expensive sources, and then the expensive sources run out, so we move on to crazy expensive sources. The higher prices are all translated onto the economy through things connected with fossil fuel (everything...). I just think at some point there's got to be a tipping point where we can't rely on the expensive sources anymore and it's just not worth it to dig it up. Even if there isn't a tipping point it's still not a workable system indefinitely.
Yes, we need to be working on alternate energy sources. You know who does that best? Private industry. Did the government develop the oil, gas, and coal industries? Nope.
I do see a role for government in nuclear power, just because of the cost and safety regulations that are required. But solar, wind, bio, tidal, etc get the govt out of it and let the profit motive go to work.