First of all you are totally and completely WRONG. On $50,000 you only have deducted $3,825 (actually less then that while the 2% break is in place) but the other 7.65% does not get deducted from your check, it is matched by your employer. With both social security and medicare on the verge of bankruptcy with the 7.65% from you and the 7.65% from your employer, imagine what will happen to it if it's reduced to 9%.
Aha! I am so happy you are awake, and alert and smart to boot! Now here is the point, that 7.65%? If you are a good employee, and your employer is a smart businessman, he would be happy to give you that 7.65% raise, WHICH WILL NOT COST HIM 1 RED CENT. Now if you are a so-so worker, then it is hopeless for you anyways.
“...imagine what will happen to it if it’s reduced to 9%.”
You understand that the base of the Business Flat Tax is not the same as the base for FICA, right ? Currently, the 12.4% that is SS only applies to the first $106K of wages ($5T base) while the other 2.9% of FICA applies to all wages ($6.3T base). The 9% applies to effectively all wages, plus business inputs from foreign businesses, plus profits — because payroll and foreign purchases are not deductible from a business’ revenue when determining “income”.
So instead of 12.4% of $5T in limited wages + 2.9% of $6.3T in all wages, there is 9% applied to $10T [wages ($6.3T)+imports($2T)+profits($1.7T)]. $900B from the 9% Business Flat Tax vs. $825B from the 15.3% FICA.
In this way, the 9% Business Flat Tax completely replaces the FICA revenues from BOTH employer and employee.
The 9% Sales tax on retail goods completely replaces the Corporate Income Tax revenues.
The 9% Flat Individual Income Tax applied to the full $12.5T income from all sources, minus capital gains income ($600B), minus charitable giving ($50B) leaves $11.85T taxable and $1.06T revenue. This almost exactly replaces the Progressive Individual Income Tax revenues.