If you think that something big should be The MITE -- legislation creating a regular, annual increase to the federal income tax's personal exemption and an income floor on FICA taxes -- it's time to talk to your US Senators and US Representative. Here's a site to help you figure out who those people are and how to contact them.
Some sample text/talking points for your email or phone call -- feel free to use it any way you like, including modifying it:
Dear [Representative/Senator] [Last Name],
Next week, the White House will roll out what its "broad principles and priorities" for tax reform. Your job in Congress, of course, is to turn "broad principles and priorities" into actual legislation. In doing so, I hope you'll consider two proposals:
1. Legislation mandating an annual, regularized increase in the personal exemption to the federal income tax. This would have the effect of cutting EVERYONE'S taxes EVERY year, while dropping the poorest Americans from the tax rolls altogether.
2. Legislation creating a "FICA floor" -- an exemption, similar to the income tax personal exemption, only to the personal/employee/self-employed share of FICA taxes. Due to lifespan variances and collection ceilings, these regressive taxes have the effect of forcing poor Americans to subsidize the retirements and healthcare expenses of wealthier Americans. Let the poorest Americans keep more of their income and use that income to improve their lives and situations.
I hope to see you named as a sponsor or co-sponsor on legislation implementing these two common sense tax reforms in the near future.