No I am not saying that people who are getting fooled are lower class. I am saying that people who are demanding proofs are lower class and jahil. This is no different than asking for proof that a male owns land or the girl is a virgin, as is done in villages in Pakistan.
If your social circle of friends, relatives and acquaintances are so untrustworthy and “Fraudiya” that you do not trust them and you have to demand proof of degrees and salary information, then by all means go ahead and do the complete background check. However, in most good families I know a brief and discreet background check is done, without having to resort to crude tactics of asking for showing degrees and pay checks.