I don't think that cost saving for 'you' is a main driver. (from the government perspective) While in use the CFL's use less electricity for the same amount of light generated.
If they lasted the same as incandescents and cost 10 times a much there still would be less energy consumed. (unless the manufacture process used that much more energy.
I've had a number of CFL's last a very long time in lights where incandescents burned out frequently.