Re: Sooo…why is being a gold digger such a bad thing?
In reality, marriage does not require legal documentaton to be called marriage.
Legal papers/processes are used these days to provide satisfactions to parties involved. That’s all.
Spiritual connection/love/sacrifice and care are essential ingredents of marital relation. Without legal contract marriage can survive if these are present. 
If ‘marriage’ stays because of legal contract then it is business accord, not marriage.