It's this + wealth inequality. The increased population growth means that an event that had to be affordable for a median income, now needs only be affordable

It's this + wealth inequality. The increased population growth means that an event that had to be affordable for a median income, now needs only be affordable for a 75th percentile income. Since median household income is around $68k and 75th percentile is 122k. A 75th percentile family can spend $50k on season tickets for a sports team, and still live an otherwise median income lifestyle. If wealth inequality wasn't so extreme, then such large price caps wouldn't be economically viable.