A gaming system that includes a gaming terminal with a wagering game. The wagering game includes a plurality of symbols that indicate a randomly selected outcome. The wagering game allows the player to be eligible for a plurality of progressive jackpots. A controller is operative to randomly increase the amount of one or more of the plurality of progressive jackpots by at least a portion of the wager input. Further, the percentages of the portion that are allocated to each progressive jackpot can be randomly selected as well. Thus, the progressive jackpots are randomly funded, instead of being funded by a predetermined percentage of each wager input.