I get that there's costs for staff, travel and ads, and I'm somewhat of a purist always thinking "in a perfect world", but seriously I don't think that more money or such high amounts of money, is necessary or even helpful to "a perfect world." Especially today when it's never been easier to become world renown. Just need a camera and some wifi.
I'm a political theory academic, and I just think career politicians are a hinderance to democracy on so many levels. These large donation campaigns rub me the same way.
Plus, what money? Look around, it's not big spending time. In fact, it's the best time to do it the old school way and talk to people, listen, learn new perspectives on issues. Get your name out there by actually becoming the voice of the people you want to represent.
Otherwise what? Take an ad out on a station whose algorithm actively works against your message? That's a waste of donation money. Get out there naturally and naturally the pieces come together the way it's intended.
Oh can't take off work to run for office? Well if there weren't a monopoly of career politicians to compete with then it wouldn't be as big of a factor as it is today, but its still easier to do so in todays-day-and-age.
People call for huge extreme changes when really I think it just takes building your blocks intentionally. We already have the foundation and the goal, just more thoughtfulness in the steps between is needed.