Everybody seems to care about cars and taxes. ;-)
So one could start to point out the difference in scope between federal, state and local tax as if you drive from one place to another.
The boundaries of the federation, state or locality are similar to blocks of a program.

Mmm, and programs compare with....cars? Yes, that quality program is like a robust car, and the notion of a beautiful program (style etc) certainly has a personal taste flavor to it!