The majority of people that vote in the US and ultimately (if indirectly) determine such matters as copyright duration, are not scrambling for healthcare or education. That majority of voters rests well above the median in fact in both income and wealth.
That's trivially demonstrated by the demographic, income and employment profiles of the majority of people that vote.
You've made a sizable mistake in thinking that that majority of voters are interested in freeing Winnie the Pooh versus boosting their equity portfolio by padding the bottom line of Disney. The majority American voting profile is one of the wealthiest on the planet. You might reassess what you think their priorities are.
This aspect isn't going to change, and no amount of wishing will make it so. The majority of US voters will continue to have a significant tilt toward their financial self-interest, which rests with Disney's bottomline and not with rapidly emptying Disney's copyright vault.
Hint: look up the median and average white + asian household income and wealth figures these days (latest Fed household survey).