Lol, as usual you're completely delusional about United's spending, which is hilarious considering the amount of times the old git has raised various domestic transfer records.
Its almost as if by ~2004 United already had world class core squad with Rooney, Rio, Neville, Giggs, Scholes, Ronaldo, RvN and VdS, and didn't actually require much spending to compete.
Same with Arsenal, they had the Invincibles.
Chelsea blew up over 200 million over the first 2 years (twice as much as the whole ******* club was worth when Roman took over) and achieved similar stability - they no longer had to spend big every season and could just move their assets around.
Meanwhile Liverpool had absolute garbage squad that somehow managed to win Champions League on a 1 in a million shot. The only people who you could considered world class were Gerrard and Alonso. Carragher was a very good defender, but he's no John Terry. Hyppia andd Hamman were solid , but already in their 30s and needed to be transitioned out soon. The rest of the team was absolute wank.