The majority of Americans think inflation is a severe problem. It's probably why a lot of them identify with the lyrics in the song.
A majority of Americans also believe in angels.
And while inflation was high following the pandemic (which may have something to do with businesses trying to recoup previous losses and/or pay the higher wages demanded by workers), it is coming down and is lower than in most countries.
I'd be willing to bet that if you polled Americans, a significant number - perhaps even a majority - would tell you that we've got it worse than places like Germany, the UK, France, and Australia. We don't. I would also hazard a guess that you could expect higher numbers from folks who listen to (keeping this tied into radio) conservative news sources with a vested interest in painting the current administration as "failing." I bet if I listened exclusively to my local conservative radio station, I might be led to believe that unemployment is high, inflation is still out of control, store shelves are empty, and that at any moment the government is going to instate a nationwide mask mandate and confiscate all of our guns.
If you look at the "big picture" numbers, apart from inflation most economic indicators are in pretty good shape. GDP, unemployment rate, stock market, etc. are all mostly positive, and have been consistently improving since the pandemic got more into the rear view. Yet there are also large swaths of the country that are still struggling. Like the factory workers I shared the floor with a few years ago. Rural communities. Small towns where the factory up and left.
Those folks are what the song is speaking to, but IMO the conservative media reaction to Mr. Oliver's follow-up video is instructive. The red state media sphere has their undies in a bunch over finding out that the song wasn't about "dang that Biden sucks, we want Trump back," and the people who identify with the song due to their economic situation rather than their political affiliation are like "you mean you didn't know? We're mad at the system as a whole." I'm sure Harry down at the gas station where I used to work and took the bus everyday because he couldn't afford a car would hear a very different message from the song than a guy who owns a $75,000 F-150 and has a Trump flag on his boat.