Yes, it Can be run liike a business.
Should it be run like a business? No, because that's not what the objective of running a country should be.
If the people who put themselves forward want to run the country like a business, they should go ahead and start and run their own businesses, which if you noticed in uniquely sg, none or very few of them ever did pre and post trying to run the country.
Ok, why shouldn't the country be run like a business?
It's like asking someone why he shouldn't be a fireman.
He's afraid of fire, he's afraid of heights, he's reluctant to face danger and take risks.
However he likes to ride in the fire engine, he likes to come down the pole at the station, he likes people shaking his hand after a successful rescue and to see his name in the papers.
His reasons for wanting to be a fireman are simply not what the objective of a fireman is supposed to be.