RP from Career board..."What are your long term goals?"

I saw an ad for a position that said to send your resume and cover letter and give a description of what your long term goals are.

Would it be in bad form to write "I want to win the lottery and never have to work ever again?"

Seriously though, what the heck are you supposed to write? My true long term goals are to raise a family and be able to support them financially! But no employer wants to see that! So what BS can I conjure up?