Can someone interpret this poem? whats the theme?

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I was at the 7-11.
I ate a burrito.
I drank a Slurpee.
I was tired.
It was late, after work washing dishes.
The burrito was good.
I had another.

I did it every day for a week.
I did it every day for a month.

To cook a burrito you tear off the plastic wrapper.
You push button #3 on the microwave.
Burritos are large, small, or medium.
Red or green chili peppers.
Beef or bean or both.
There are 7-11's all across the nation.

On the way out I bought a quart of beer for $1.39.
I was aware of social injustice
In only the vaguest possible way.

Capitalist Poem #5, Campbell McGrath