The vote age probably has to remain 18 due to age of majority, contract and equal protection. We’d be fine if it was serve, or pay taxes. The key though is to re-separate money creation from the private sector. The CRUCIAL inherent problem cause is the ability to leverage the creation of currency for paying for voting blocks of non productive, counterproductive, or outright anti American people and projects intended to pay off influencers.
The voting age used to be 21 and it took a Constitutional amendment to change it.
We need to pass another amendment to make it 25-30, you should have your brain development finished (not done until 25) and some experience before you engage in the most dangerous activity in the world. (voting)
Money printing needs o be eliminated in favor of precious metals as the Founding Fathers intended so that it is limited by the actual availability of metal.
Nobody who gets any money from the government should be able to vote. (except the military and perhaps office holders)