This is not on actually on Who's Next, it's just one of the bonus tracks added later.
And it's hard to analyze this as an individual thing (though the meaning seems to be obvious), as it's part of the Lifehouse rock-opera, the one between Tommy and Quadrophenia that never was finished. It fits well in Who's Next, most of the songs there were supposed to be in Lifehouse too.
This is not on actually on Who's Next, it's just one of the bonus tracks added later. And it's hard to analyze this as an individual thing (though the meaning seems to be obvious), as it's part of the Lifehouse rock-opera, the one between Tommy and Quadrophenia that never was finished. It fits well in Who's Next, most of the songs there were supposed to be in Lifehouse too.