By Susan Cornwell and Andy Sullivan WASHINGTON (Reuters) – President Joe Biden’s proposed $1.9 trillion coronavirus relief bill would phase out $1,400 payments to high-income Americans in a compromise with moderate Democratic senators, according to lawmakers and media reports. The Democratic-controlled Senate expects to open debate on the package as early as Wednesday, with a final vote for passage seen later in the week. Before the bill hits the chamber floor, Democrats are negotiating limits to a measure Republicans have attacked as wasteful. Senate Democrats said the proposal, which would b…