How is it legal for someone living in Michigan to use their car for an occupation that requires using the roads extensively allowed to have out of state plates?

Fuck that I pay for my tags here and pay the gas tax for the roads. 

Anyone doing the gig work should be subject to pay for their tags in whatever state that they are using the vehicle for the gig work. Unless they are just visiting which needs to be followed up on. 

Clean the gig economy up or end it. 

The way it is now is complete bullshit.