U.S. presidential elections regularly result in campaign spending measured in billions of dollars per side. In the UK spending is capped at just £53,000 per constituency, which means a total of £34m of spending for a party with candidates in every constituency.
Campaign spending in the U.S. is literally two orders of magnitude greater, the fact that someone wins while only spending $2billion rather than $3billion really doesn’t say that much. Musks contributions to Trump alone are an order of magnitude greater than the total spend allowed for an entire party in the UK.