WASHINGTON — President Biden, in an effort to pay for his ambitious economic agenda, is expected to propose giving the Internal Revenue Service an extra $80 billion and more authority over the next 10 years to help crack down on tax evasion by high-earners and large corporations, according to two people familiar with the plan.

The additional money and enforcement power will accompany new disclosure requirements for people who own businesses that are not organized as corporations and for other wealthy people who could be hiding income from the government.

The Biden administration will portray those efforts — coupled with new taxes it is proposing on corporations and the rich — as a way to level the tax playing field between typical American workers and very high-earners who employ sophisticated efforts to minimize or avoid taxation.

Mr. Biden plans to use money raised by the effort to help pay for the cost of his “American Families Plan,” which he will detail before addressing a joint session of Congress on Wednesday.