Err, that's wrong. With the old EPA tests, a Hemi-powered 300C gets 25MPG highway. The new tests drop that to 22 or 23. (I have a mechanically-identical Dodge Magnum.)
The only reason Barack replaced his 300 with a half-baked hybrid was because of the bad PR from him driving a "gas-guzzling" luxury car.
Err who cares!
The guy's a MILLIONAIRE!!!!!!!! A millionaire driving a glorified Dodge family car that gets 23 mpg... that's still nothing wild in the least.
Now if he was driving a Bentley or a H2 or something (like say Schwarzenegger) then I might give you some point... but a Chrysler with a cylinder deactivation engine... come on...
The Hemi features cylinder deactivation in the 300C and Magnum R/T; the "Multi Displacement System" (MDS) turns off the fuel consumption in four cylinders when V-8 power is not needed. This provides a world class combination of performance and fuel economy, without the driver noticing any difference. The MDS system has, according to Chrysler, saved nearly 100 million gallons of gasoline since 2005, and reduced carbon dioxide (CO₂) emissions by close to a million metric tons.
And like you said the other car he picked was a Ford Escape... another moderate car for a millionaire to be driving.
You can support the growth of more fuel efficient vehicles and still drive an average gas mileage type car. I know because I could be driving a Prius or something myself but drive an Audi A6. It gets around 27/28 on the highway not 40 or 45 but I love my A6... and it's still far from any of the real gas hogs.
The point is you want to see the technology evolve so more and more cars & even bigger vehicles are able to be fuel efficient as well.