With more money, you can't build more Biebers.
And given that music is especially easy to copy with the internet, it doesn't follow that their popularity will decline, it simply means that fans will be limited to only watching via TV or the internet rather than being able to attend concerts.
Likewise with sports and sports teams.
Money is the means to prioritize needs in a world of scarcity. If everyone just had more money it would instantly become worth less (not worthless).
You are conflating the live entertainment market and the recorded entertainment market. People will still want to see live music even if it is not some blockbuster name.
Besides, when the rubber meets the road every big name concert I've been to at a stadium size venue is essentially the same as watching a recording because you just watch the big screen anyways.
If you really want the best live experience you just book the artist for your birthday gala. Do you think we should all be able to do that too?
They are expensive, but that is different to scarce.
They especially aren't inherently scarce, which is what I actually said. You missed out the most important word.
There is a natural scarcity to top sports teams or top music artists. Artists can't be cloned and there can only be one champions league final each year.
What I don't think you realize is that rules against scalping help create a mono-culture. Sure huge swathes may be barred from a Bieber concert or whatever is popular today but if that happened the dearth of access to that content will lead to its decline in popularity.
If we let that happen it would open up room in the market for smaller artists and artists at every other level to thrive and build audiences that would otherwise be glued to whatever the corporate record companies are hocking.
A similar way to think about it is that most people would love to have their own yacht but scarcity makes that very difficult. Does everyone deserve a yacht? Instead, with a market, a few super rich get to have a yacht (woopty doo) and the rest of us who want a boat own something smaller and more reasonable.