One: Eliminate the mortgage tax deduction, which lets homeowners deduct the interest they pay on their mortgages. Gone. After all, big houses get bigger tax breaks, driving up prices for everyone. Why distort the housing market and subsidize people buying expensive houses?
Two: End the tax deduction companies get for providing health-care to employees. Neither employees nor employers pay taxes on workplace health insurance benefits. That encourages fancier insurance coverage, driving up usage and, therefore, health costs overall. Eliminating the deduction will drive up costs for people with workplace healthcare, but makes the health-care market fairer.
Three: Eliminate the corporate income tax. Completely. If companies reinvest the money into their businesses, that's good. Don't tax companies in an effort to tax rich people.
Four: Eliminate all income and payroll taxes. All of them. For everyone. Taxes discourage whatever you're taxing, but we like income, so why tax it? Payroll taxes discourage creating jobs. Not such a good idea. Instead, impose a consumption tax, designed to be progressive to protect lower-income households.
Five: Tax carbon emissions. Yes, that means higher gasoline prices. It's a kind of consumption tax, and can be structured to make sure it doesn't disproportionately harm lower-income Americans. More, it's taxing something that's bad, which gives people an incentive to stop polluting.
Six: Legalize marijuana. Stop spending so much trying to put pot users and dealers in jail — it costs a lot of money to catch them, prosecute them, and then put them up in jail. Criminalizing drugs also drives drug prices up, making gang leaders rich.