No, the poor are also getting richer: https://fred.stlouisfed.org/series/WFRBLB50107

You're looking at what percent of the total wealth pie do the poor get. But the pie itself is growing, and so is _everyones_ slice of the pie.

Maybe you think its an inherent problem that some people get a bigger percent of the pie than others. But its objectively untrue to say that the poor are getting poorer.

That stat is not real income. The dollars don't matter if they buy less.