Is tanking really that big of a problem to warrant this? I think there are a couple fallacies at play here:
1. The draft lottery is broken: it may not be the best, but the worst group of teams in the league get the top picks.
2. There is WAY too much emphasis being put on the draft. The players selected #1, #2, #3, etc still have a high chance of being totally marginal players. Look at the Kings, worst record year after year after year, did the draft bail them out? Not until they got DMC and he was not a #1 pick.
3. The idea that this will prevent tanking. I do not believe the #1 reason teams tank is to get a high draft pick (because, odds are, with the worst record, you are getting the #4 pick). The reasons teams tank are: 1. Save salary to get that special free agent later (remember the Lebron/Wade/Bosh sweepstakes and the tanking that went into that year?). 2 Save salary $ to divest from a bad season (maybe your star gets hurt and you are out of the playoffs either way, why pay more for that season?) 3. Save $$ for your horrible Mafool style owner to have more take home pay.