@joefromchicago,
Irony might be the wrong word.
Something like:
- Republicans cross arms and say they won't use stupid liberal reusable bags, which are stupid and liberal
- Liberals say fine, if you won't do it of your own accord, we'll pass this tax to goose you into doing it
- Republicans say "don't tax me bro! you can't make me use your stupid liberal reusable bags"
- Tax passes
- Republicans protest the tax by using intelligent, Republican reusable bags instead. Take that liberals!