Factoring in size of economy Ukraine numbers make sense
As to Russias spending I wonder how reduced net revenue from petro sales, loss of military export market, much increased imports , and devaluing of ruble and inflation factor into this?
If I were to guess I would say that military and internal security portion of budget is under estimated, as well as gdp since much of that is built and then blown up. Not exactly long term economic gain there, but I am not an economist, and numbers from Russia like China are always suspect.
Right, there is a lot of negative information out there about Russia's economy and demographics, but how much of that is actually critical to Russia's war efforts is unknown.
If Russia is spending 50% of its budget, or 15% of GDP, that is huge, but still a very far cry from Second World War numbers which for Russia were circa 80% of GDP.
So it's impossible for me to say today how much they might adapt and adjust their economy to keep their war efforts going.