Maybe if she had been an actual economist, she'd have known that employer NI + salary + benefits are all the "cost of an employee". Let's call that X. Then you have the value of the employee, lets call that Y.
If X is greater than Y then you must reduce X. If Y is greater than X, then you must retain the employee. That is pure economics for a company operating in a market economy.
So increasing employers NI, costs jobs and impacts working people. its funny that she understood this in 2021, but not in 2024.