"Good, we have lost our colonies. Nothing better could have happened to us, since that will force our capital-financial elites to invest money in our development" -said no one, ever
Seriously, contrary to what people who insist on projecting back the idea that the inhabitants of the past only cared about the economy and money want to think, losing colonies was considered a national tragedy.
Proof of your "inferiority" as a nation and the evil of your vile enemies. Something to feel wronged about and an unforgivable offense to avenge. Nothing to be celebrated.
Yup, the US is still upset that the Philippines are no longer a colony.
Reality Check on the 3 largest western European countries & prosperity after WW II:
-UK:
Lots of colonies before WW II
Meh post-WW II economic growth despite limited damage compared to other major combatants and discovery of large oil/gas reserves
Many still butt-hurt over loss of colonies
-France:
More colonies than most but not as many as the UK
Lots of devastation in WWI and WWII, and solid growth post WW II considering the devastation and not having any giant off-shore oil and gas fields
Most folks not all that upset about loss of most colonies (except some are still angry about Algeria, but Algeria wasn't really a colony; also these folks who are angry about loss of colonies are also often angry about people from current & former colonies moving to metropolitanFrance)
-Germany:
Very few colonies compared to the UK or France;
Tremendous economically damaged by WWI and WWII, and miraculous economic development after WW II
Also, probably most German are probably pretty darn happy at this point about losing what colonies Germany had as it's one less thing to feel guilty about
My conclusion: All-in-all, not everyone's upset about losing colonies at this point, imho