President Biden is reportedly planning to include the first major tax hike in close to 30 years in the next economic spending bill set to follow his $1.9 trillion coronavirus relief package.The next spending initiative — which is expected to be even bigger, costing as much as $4 trillion — won't rely on just government debt as a funding source and could include an increase in both the corporate tax rate and the individual rate for high-income earners, according to Bloomberg News, citing a person familiar with the matter.The planned changes include: raising the corporate tax rate to 28% from 21%, raising the income tax rate on individuals earning more than $400,000, expanding the estate tax, creating a higher capital-gains tax rate for.