I've just read one of the major mainstream sites that war in Ukraine will last for years.
US and allies have a priority to bleed Russia dry, all the way to the bone, through combination of sanctions and war expense, and now they have
once in a lifetime opportunity. If they miss it they will regret. If they don't miss opportunity they can break up Russia into pieces and get all these Russia's commodities at a prices they can control.
Its no brainier.
Russia will bleed quite fast, with its antiquated weaponry and zero chance to stop inflow of super high-tech NATO weaponry through Ukrainian western borders that will forever be out of Russia's reach.
NATO effectively has Russia cornered in an unsustainable condition. I guess guys from Rand Corporation are drinking champagne every day.
Only additional expense for the West is cost of welfare for those 4 million Ukrainian women and children who are now in EU. But that's not covered by US tax payer's money, but with EU taxpayer's money, so it should be OK

.