Would you say the term "Good Family" is relative?

I'd say it's mostly relative. Personally, I don't see working for the government to necessarily imply that they're taking bribes etc. Someone working for the government can definitely be a good and honest person. When it comes to rishtas for my children, I wouldn't be automatically turned away by the fact that someone is working for the government.

As far as praying 5 times a day, I consider it to be a bare minimum. I wouldn't even consider anyone who doesn't regularly pray 5 times in a day. However, if there are members of the family who are not regular in 5 times salat, I would not hold that against potential rishta as long as he/she is regular with theirs. Of course, this is one important factor that I would consider to determine if a family is "good" or not.

Maybe I'm naive about the politicians. but I wouldn't automatically assume that they're involved in bribery, cheating and deception. I wouldn't consider their family bad without having good reason to have that opinion.