In GF when Michael visits Moe Green in Vegas he makes a statement that I don't quite understand.....

MICHAEL: Your casino loses money -- maybe we can do better...

MOE: You think I'm skimmin' off the top, Mike?

MICHAEL: You're unlucky

Could Mike really think Moe is "unlucky"? Without knowing the casino business, I can't believe a casino would lose money because it was unlucky. Was Michael just trying to aggravate Moe and put him on the defensive?