The US federal corporate income tax was first implemented in $1909,$ when the uniform rate was $1\%$ for all business income above $$5,000.$ Since then the rate peaked at $52\mathrm{.}8\%$ in $1969.$ On Jan. $1,2018,$ the corporate tax rate was changed from a tiered structure that staggered corporate tax rates based on company income to a flat rate of $21\%$ for all companies. $1.$ What do you think are some pros and cons of the flat corporate tax rate? $2.$ Do you think the $21\%$ flat rate should remain, or should it be progressive like individual income tax rates. Please elaborate on your standpoint.