That's going to be an extremely tough sell to the western Europeans. The welfare state will be completely destroyed.
In Denmark the propaganda still works and the average people, as well as virtually everyone who has opinions for a living, is still in critically supporting the idea of mindless military escalation to defeat the Russian menace. Until now the regime has been able to fund the spending spree with the surplus generated by previously existing this public finances but the party is soon going to be over and the regime will have to find the funding somewhere.
A few years ago they abolished a public holiday to fund the military and even though people were even more Slava Ukraini back then it made the regime extremely unpopular and strained their traditional relations to the unions as well as to other right-wing parties. They have never recovered.
In a televised "debate" on how to defeat the Asiatic hordes, that took place shortly after Trump had his fallout with Zelensky, the regime tried to deflect on the question of funding, knowing very well that while the average westerner loves blood and steel they don't live paying for it. However the frivolous far-right "Liberal Alliance" party, the most popular party to the right of the regime and likely to gain significant power if the regime falls, were less mealy-mouthed, they wanted to reduce unemployment benefits from two to one years, with no reduction in unemployment fund membership fees for workers, in order to fund the military.
I reckon that we will see significant austerity to pay for militarism but I also don't think it will be a walk in the park for the ruling class to do. Propaganda can't make people forget about their material conditions forever.