An employee is a tax-deductible expense.
Having higher taxes means that there will be a lower net cost of hiring/paying that individual.
Lower taxes mean more net profit can be kept without the need for additional hiring to write off as a tax deduction.
This would also apply to paying employees more. Higher wages and better benefits would be “putting money back into the company” - another tax write-off, but the lower tax rates would be incentive to hold on to this money, or invest it elsewhere as opposed to putting it back into the company as an operating expense/tax write off.