The proposed idea is a technical one that doesn't work for the promoters or artists or venues.
The promoters want to know very early whether the venue is the right one for the number attending and whether to upsize, add dates, or even to go the other way to a smaller venue. The time to book a venue is very long... So they need as complete data as they can about sales as early as possible (they would love if 80% of the tickets that will sell can be sold in the first week - as then they can quickly make a decision about whether this is the right venue and if more dates are needed).
The artists want to enable as many fans to get in as possible, including young and poorer fans... Who tend to be more evangelical about an artist and drive their growth more and ultimately are more loyal and spend more over the lifetime of being a fan. They are poorer but more sticky. The artists also want to play to as full a venue as possible as that is the best atmosphere.
The venues want to have surety in their bookings (see the promoter dilemma as to whether to change venue) and for the capacity to be as close to full as possible as they will make more revenue from bar and food sales than from pure ticket sales.
All of these... All of them... Are not solved by the technical solution proposed except when it doesn't matter... When you're absolutely sure you're going to sell out. In which case you also don't need to change anything or invest in anything new because you're going to sell out anyway.
There are solutions that can threaten the current model... But this blog is not one of them.
In fact, the idea that "I have more money and deserve more to have a ticket over someone that doesn't have as much money" is antithetical to the thinking of every artist I've ever worked with.