I think there's a case for looking at the current penalties for admin and seeing if they need increasing, but applying that reasoning retrospectively to Bradford seems harsh.
Nothing retrospective here. After Cru and wakey's problems last year RFL/SLE changed the rules. The 'up to 6 point' immediate penalty remains but it was made clear that options including expulsion and dropping a club 1 or 2 divisions were available. All clubs entering SL in 2012 knew this.
There has to be some discretion in the decision making. For example if a major sponsor went bust and did not pay a SL club and this caused problems then the RFL would probably cut them some slack. However a club that continually took advances / loans and could not or would not repay them, a club that continued to wrack up 'debts' to the HMRC, A club that got its fans to raise £500K then went into administration may not get so much slack.