I dunno about how to get Republicans to agree -- I mean, you probably can't get the vast majority, so it would really need to be the Dems, with maybe a few stray Republicans who could somehow be convinced -- but, I think the general idea would probably be to close loopholes for very rich individuals and for corporations. Like, if you Google "how much tax does Amazon pay", cnbc and fortune seem to suggest they paid no income tax. I mean, this article...
https://www.wsj.com/articles/does-am...er-11560504602
... suggests it's not so simple, and I think ultimately suggests we "can't know" exactly how much Amazon pays in taxes ... but, to my mind, that kind of reasoning would be what we mean, when we say, "loopholes". I don't think Amazon has done anything illegal, tax-wise, I'm sure they are strictly following the rules ... just, the rules are set up to benefit them, incredibly.
And every other major business, and every individual with a great deal of wealth, which all makes sense, because these would be the people who would have lobbyists and such, and ultimately have the candidates' ears, and who in turn can benefit candidates greatly, when it comes to re-elections, and to retiring to cushy corporate jobs.
I mean, I'm not saying it can
all be paid for, by taxing the rich ... but, I guess I am saying, I suspect that your rank-and-file voter will likely be more able to swallow significant increases in taxes for the upper crusts, than on the middle class ... and honestly, there's just the basic reasoning that if we take 20% of your income and you make 10 million, you're still doing pretty okay, versus if I take 20% and you make 10 thousand ... yeah, you probably just go from relying on the kindness of strangers to being outright homeless, in the latter case.
And sure, poor Republicans are fiercely protective of their masters' wealth, regardless of how horribly screwed they, themselves, are. But I suppose the idea would be that enough of the general public would be able to see reason, to manage positive change, despite those very confused souls.