$275/year comes out to a little more than a dollar per business day. With minimum wage being $15/hr in Seattle, this amounts to less than a 1% salary tax even i

$275/year comes out to a little more than a dollar per business day. With minimum wage being $15/hr in Seattle, this amounts to less than a 1% salary tax even in the maximal case. Making it vary with salary probably wouldn't have much if any impact.