What did the larger corporations widely do after Trump's taxcuts? Invest heavily in stock buy backs. They have the means to pay their workers more, they just do

What did the larger corporations widely do after Trump's taxcuts? Invest heavily in stock buy backs. They have the means to pay their workers more, they just don't want to. Also, they "can't increase wages if it makes them uncompetitive" doesn't square with "Everything Is Booming[...]" bit.