>>149971724 (OP)
Even if they can't solve everything it more or less rockets them to a core cast member if not leader position for any team book where they'll fund everything.
Which in turn results in them becoming more ambiguously wealthy and knowledgeable to maintain the smokescreen of how they're covering all that as adventures escalate.
Bruce Wayne goes from a cave filled with admittedly already impressive wares while confined to Gotham to a personal space station with the Justice League. The others assist with developing it, but he's implied to be footing the bill somehow.
Another example is MCU Tony reasonably manage his Iron Man escapades in his movies to having an orbital Hulkbuster system and being able to repair significant Hulk damage to a city in Age of Ultron.
Even a less than stellar example can be found with Hawkman in Black Adam, it makes sense a long lived individual could get their hands on some degree of significant wealth and tech but he's well beyond convention and clearly in charge instead of just part of the JSA.