Seeing as how bed bugs just don't care about your social status or income, anyone who comes into contact with them almost guarantees that they get spread elsewhere. Now, the only difference is how they're dealt with since it's obvious that those who can afford to get rid of them will find the means to do so but for others?
I actually had a co-worker just recently back in the fall, who had to have his place sprayed because he got them but it was his own fault. He found a discarded mattress on the street and took it inside his place.
Presto. He had bed bugs. Showed us the bites too. Not pretty. We all laughed at him.