You are talking about people who are working comfortably but from paycheck to paycheck. The ones who invest large sums to create jobs will truly consider these tax cuts before investing in projects. If their taxes are going up, they're NOT going to be investing in projects. Therein lies the decrease in revenue from jobs not created. If taxes are lowered significently, investments are made, projects are started, workers are hired and they pay income taxes. The more jobs created and workers hired, the more income taxes are paid, plus the investors pay income taxes on their revenues from the new projects.