A pensioner in Bulgaria gets half of what a Greek pensioner gets in Greece right now.
If the Bulgarian pensioners are earning less, then it is the fault of the Bulgarians and their government, not the Greeks' fault. An average pensioner in Greece has contributed as much as 10 times the amount to the pension fund, compared to the same by the Bulgarian pensioners. Using that logic, the pensioners in Greece should be getting 10 times the pensions as in Bulgaria. But that is not the case, as 80% of the money in the pension funds are diverted to make the debt payments.