A Voucher Based Political Donation System

Why?

The Unites States of America has many problems with our political system. We have an system which favors big money interests over those of the people, according to a Princeton Study^[1]. And we see this all the time too, for example Cory Booker voted against letting citizens import drugs from Canada which are way cheaper than they are in the USA. Wonder why, look no further than where he gets his money from, huh, isn't that strange he received $216,500 from Pharma/Healthcare SuperPACs^[2]. Or when Tom Price(our new Secretary of Health and Human Services) bought biotech stocks, than passed bills that would make their price go up^[3]. Nothing shady there, #DemocracyInAction

What?

What I am proposing I guess is similar to the thing they have in Seattle, idk just wanted to spit out an idea.

Instead of having our current system with big donors and SuperPACs and shit. I propose a simpler system, of vouchers of $5 per month for every voting age American. We would then enable Americans to set up an automatic donation to the party of their choice.
In order to make sure new ideas aren't blocked by lack of donors, for all parties that are capable of securing the donations of 0.1% of the population, or approximately 300,000 today, they would become eligible to receive $5,000,000 of annual funding and as long as they maintain that they will keep the funding.

Estimated Cost

1. Vouchers per eligible voter of $5 per month, If 200 mil adults^[4], annual cost would be $12,000,000,000. 
2. Funding for parties, $5,000,000 annually if they have 300,000+ donors, based on third party votes in 2016, or all non Dem+Repub votes^[5], there were 8,261,498 voters, that would result in a theoretical 28 parties, or federal funding in total of, $140,000,000

Estimated Annual Total : $12,140,000,000


Sources

[1] : http://www.bbc.com/news/blogs-echochambers-27074746
[2] : https://www.opensecrets.org/politicians/industries.php?cycle=2016&cid=N00035267&type=I&newmem=N
[3] : http://www.cnn.com/2017/01/16/politics/tom-price-bill-aiding-company/
[4] : http://www.politico.com/story/2016/10/how-many-registered-voters-are-in-america-2016-229993
[5] : https://en.wikipedia.org/wiki/United_States_presidential_election,_2016#Results