Not sure where the "old communist guys" are coming from. Most of the current crop in power have their roots in the Solidarnosc movement. One of their last major acts was an attempt to "out" all former communist associates in public life, so I don't think they are afraid of any revelations (unless of course it would be that the brothers were "ubecy")
I'm probably confusing scandals here then. One of the problems the Polish government has faced in recent years is the ex-communist officials and associates in the government, particularly the intelligence services. Both because of their involvement with the old communist government and with their apparent tendency to be even more corrupt then the average government official.