Well you did say money no object!
IMO even at current budget, the UK can afford another carrier. But it's a question of where and how the funds are spent. Same with the Russians.
Currently, the military budgets of France, England, and Russia are roughly comparable at $60 billion USD/year. The Russians would like to budget $730 billion over the next 10 years for defense, or $73 billon/year average. Russian press also indicated that the current budget includes $15 billion for new procurements. The Russian Navy has about a dozen new submarines on order, 8 new frigates, 27 new corvettes, 1 new landing ship, 2 Mistral assault ships, plus assorted support ships ordered (excluding “planned” orders).
The 2 Mistral assault ships from France cost $1.7 billion USD, and Russia plans to procure 2 more in the future. The combined value of the 4 Mistral class ships is $3.4 billion USD. In comparison, the British 65,000 ton QE class carrier costs $3.5 billion to build ($4.7 billion/each program cost), vs the USN America Class LHA costs $3.4 billion ($4.5 billion/each program cost).
IMO if the Russians can afford to buy 4 Mistral class ships and Yasen class SSGN (estimated at $1.6+ billion each) , they sure can afford another carrier plus 2 wings of MiG-29K’s ($1 billion/24 planes). But the Russian Navy’s decision makers have other priorities. Same with the RN.
The decisions made by these European navy planners, along with choice of conventionally powered new aircraft carriers, means that they intend to be regional powers with expeditionary & force projection capability, but they don’t intend on being the global policemen ("world-wide commitment"). Someone else is already doing that job at the cost of $700 billion to $1.4 trillion annually!