Why is that? I can immediately think of at least a few scenarios where it could be aligned - not saying they're all realistic or achievable and I haven't thought them through, but if anything UEFA and the domestic leagues have plenty of time right now to think about all the different options.
In your hypothetical scenario - since there's no European football next year, top 4 this season stands for nothing. The top 4 in 20/21 qualifies for Champions League. Maybe as some sort of compensation, you can split at least the entry money between teams that qualified this season (for nothing) and teams that qualify next season, e.g. Liverpool qualifies in both, gets 100% of entry money, Leicester get 4th this season but Utd gets 4th next season, you guys both get 50% but Utd gets to play CL.
Again, not saying this is even remotely possible, but just wanna point out that there are dozens of different solutions to the problem we're faced with. They all depend on how long this virus is gonna stick around though. What if normal life only resumes by the beginning of next year for example? We just don't know at this point.