The thing is even those who wager more, who got more tickets are sometimes don't get the jackpot or some consolation. Though it favors most on those who have more bankroll others are still chasing to play hoping they still got those luck in their hands.
Since they will have more tickets, the probability of winning a jackpot is more with those people. However luck do counts everywhere.
Another point of view is that we only see that whales wagering with big amounts, we fail to see the risk they are taking because they could even lose this amount while they gamble. So the reward they get is based upon the risk they had took earlier.
That is very true, if you have a lot of tickets you have a bigger chance to win but not a sure fire thing, you could still lose and someone with a very few tickets could win, or even someone else with a lot of tickets as well, it is always a risk to go on with gambling huge amounts. But, if they end up gambling all this much, lose that money, get tickets, not win anything and just happen to be in minus a lot, that is going to hurt a lot, I mean surely they are gambling money they can afford to lose (hopefully) but it is still a lot of money.
But there is a chance they can gamble a lot, win a lot in gambling, and also end up winning the whole thing with their tickets as well, and that would be just the opposite. So, they are risking big to win big and that is what it is going to be like, I believe people who gamble a lot do deserve to get a lot of tickets as well.