> 
> Why don't you go pay for them?
> 
> 
> 

It's pretty common in USA to form this question in this form. However, I suspect that we need **to** or "and" between **go** and **pay**. Why one is correct and why?

> 
> Why don't you *go pay* for them?
> 
> 
> 

vs .

> 
> Why don't you *go to* pay for them?
> 
> 
> 

vs.

> 
> Why don't you *go and* pay for them?
> 
> 
>