well then I guess you have a problem.
...and no record breakers, despite a $20k offer to do so.
Things are tough all over huh.
The record has already been surpassed, just not in number, and on different equipment. But better runs have already been made by current players.
To make even a half serious attempt at the official Mosconi record on the same equipment would take a pretty serious investment of time, effort, and money. The financial cost would be in buying a table, and camera equipment if they don't already have it. The time would be however long it takes. There is a lot of luck in any really high run in straight pool. Because of the luck factor, the record could take anywhere from weeks to months of serious effort by a top player. Because a player can't control the luck factor, he is going to assume worst case scenario (that it will take months of effort as opposed to a shorter amount of time if luck happened to be on his side too) when deciding if it is worth it to devote the effort. So he is only going to make the effort if the reward justifies the months of effort.
First, the player is going to have to by a 4x8 and have it set up in their home with the same specs. And if they have the room and money for a table, they probably already have a table, a 9 ft no doubt. They have to get rid of the 9 ft somewhere now too. It would take a lot for someone to go through that hassle and expense, especially considering none of the tournaments or gambling matches are played on that equipment today so they are hurting themselves in the process when it comes to being able to conveniently practice for today's tournaments and such.
Second, the players have to know about a reward for breaking Mosconi's record before it has any incentive. Something can't entice you if you haven't heard about it.
Third, even if they know about the reward, they have to believe that the people offering it would 100% come through with paying it out if they broke the record. Nobody is going to spend what could be months of effort if there is any doubt in their mind on whether it would actually be paid out.
Fourth, the reward has to be large enough to justify their expenses and what could be months of hard effort. I doubt for most pros that $20,000 is enough to justify spending several thousand on a table and camera equipment, giving up the 9 ft that you use to practice for current events and matches, and investing what could be months of serious pool playing and filming effort and hassle.
Fifth, the award would need to be extremely large to justify trying for it if it was on a "first person to break the record gets the reward" basis. Nobody is going to go through all the money and hassle of getting camera equipment, getting an 8 ft, getting rid of their 9 ft, spending what could be months of serious effort in the attempt, all with the hassle of making sure every second you are at the table is always being filmed with no glitches, with the risk that several months in after all that financial and time investment another guy gets the record before you do. It either needs to an offer of like $30,000 that is made to and valid only for one specific person, or it needs to be $30,000 for EVERY guy that can do it within a certain time period no matter how many end up doing it (so if three guys do it within the time frame they each get $30,000), or it would need to be much, much larger reward to justify all that effort for nothing when some other guy could beat you to it by a day.
Give us some more details about this $20,000 reward. Who is offering it, how has it been publicized, and what things have been put in place to ensure that it will actually be paid out (is it in escrow, has the reward offer been made in a way that is legally binding on the person making it, etc)? What are all the exact requirements for being able to claim the $20,000 (what are the requirements for proof, equipment, etc)?
I'm thinking it is not enough money to justify the effort, especially if the payout isn't absolutely 100% assured, and if it is on a "first to break the record" basis. But again, you don't have to take my belief on it, you can just ask the top pros what they would feel would justify their serious effort to break it and get it straight from the horses mouth. I'm betting it is along the lines of what I have mentioned though. Please post here what they say when you ask them.