That varies state to state. The primary difference in most states is that employers pay I to an unemployment insurance pool that is used to fund unemployment payments to employees that are fired without cause (I.e layoffs). The employers costs for this increase with the number of people they lay off. However if someone is fired with cause, they generally don’t quality for unemployment payments and the company’s rate does not increase.

TLDR yes you can get rid of an employee easily but the costs vary depending on with cause vs without cause.