Just because a guy never does time shoud not arise suspicion. The guy Lancelotti is probably smart enough to maintain plenty of insulation by only talking to a few select guys. Further, he seems primarily involved in gambling and nothing heavy.
You keep a low profile, surround yourself with a few trusted guys, and NEVER talk on a phone or in a car or the same place, you can have a good run.
Comparing him to Scarpa is a poor comparison. Scarpa had a lot of murders under his belt and was a strong capo in a NYC family who had direct contact with a ton of different guys.
Lancelotti doesnt even come close to that.