I pay both sides of my fica (self-employed) but then so does everybody else. The employer really doesn't pay any of it.
The employer really doesn't pay any of it.
That's true of any business tax as it all comes out of sales revenues from customers or the business ultimately goes bankrupt.
That having been said however should the FICA tax be repealed the only amount the employee can lawfully get out of the employer is that which is declared as "gross" wage/salary, not gross plus the employer's half of said tax.
It is up to the business and competition to figure on what to do with its half of FICA remittances, whether spend it on growth enhancements, increase employee gross wages, increase investor returns, decrease product prices, or some combination of all of the above. The employee has no particular legal claim, though keeping experienced & valuable employees with a gross wage increase is a reasonable business decision, it is not the only one that can be made.