Bury field an ineligible player in the FA Cup by mistake, realise, tell the FA. What happens? They are kicked out of the FA Cup, as per the rules
West Ham field two ineligible players in the Premiership on purpose and don't tell the FA. What happens? A fine of a few million, which is nothing compared to what they would have lost if they'd been given the points deduction they deserved and relegated to the Championship.
We're worse than Serie A. And now the FA have set themselves a precedent, I'd like to see them dock points off anyone ever again. If Wigan go down as a result, I can see Dave Whelan suing the FA.