You probably meant 75 cents.
It is not all or nothing; it is just that the more one has to pay for something (in this case, labor) the less one buys. Very common sense.
As noted, there are tradeoffs in the labor market (as there always are in life). The people who have a job get more money but fewer of them are hired.
And that depends upon the cost to automate. If it cost you $10 million to purchase a burger-flipping machine then you would be very unlikely to automate. If it cost you $1000 then you would purchase the machines this afternoon.
DB2