Because that’s what he does.

The proposal would offer experienced workers who now make less than $50,000 a form of wage insurance, allowing them to replace half of their lost pay. The benefit would cover up to $10,000 over two years.

[…]

The White House plan would require states to provide insurance for workers laid off from jobs they had held for at least three years. The plan would be federally-funded, but it would be administered through state unemployment insurance programs.

Other measures proposed by the White House on Saturday included a requirement that all states provide at least 26 weeks of unemployment insurance benefits, and the creation of a permanent program that would automatically provide up to 52 additional weeks of federally-funded benefits for states experiencing rapid job-losses or high unemployment.

The answer to unemployment and underemployment is not to subsidize it.