Difficult to know what to do if they've come to the conclusion that the club will be worth another £2-3bn in a couple of years. If it was a business making loo roll then any owner in the world would keep it under those circumstances.
I'd also guess (and am prepared to be shot down here), that the Glazers, and their business advisers, shareholders etc, don't necessarily view themselves as being responsible for Utd winning less. They'd argue that after taking over they oversaw an 8 year period of success, and vastly increased the turnover of the club. £243 billion in 2005 to £711 billion in the year before covid is massive, and likely outweighs other clubs' increases. If they view themselves as integral to this increase in value (and i don't have any idea what proportion of it is down to them), then they may well feel entitled to profit from it as owners. They could argue that the only reason they are able to pay the fees and wages that they can, is down to them, the Glazers. The only obvious factor that correlates with Utd's decline is Ferguson leaving ( and potentially Gill).. It's a tough one because I can well believe that in the corridors of power the narrative is hugely different to what we read on these message boards. Like I say, it's not necessarily a viewpoint I buy in to, but i wonder if it has some traction.
Hypothetically speaking, if the Glazers could somehow prove that due to their stewardship the club was worth eg £1bn more than it would have been under the old ownership, and with a turnover £100m more than it otherwise would have been, should they be rewarded for that? Would it justify the dividends? I'm not sure, but i think this is not quite the black and white issue it's often described as. It's more a result of the juxtaposition of high finance and elite sports in general, than specific to Utd.