If your over 5 years old, you know the difference between right and wrong. The thing about taking from a big corporation, is you aren't taking money out of the peoples pockets you intend to. The big wigs and board members are getting their money. They'll offset losses to theft in price increases.
The only thing I learned in economics class was the phrase "Theres no such thing as a free lunch". That has stuck with me for 20 years now. Somebody, somewhere, foots the bill in labor or capital for every product on earth.
You did the right thing paying for the shoes. I posted a quote on here the other day that seems applicable. How people treat you is their karma, how you treat them in return is yours.
I dropped $80 in a pawn shop about 10 years ago. Terrible part of town, and inner city pawnshops always have sketchy customers, just the nature of the beast. I didn't realize I lost my money until I went to pay for my groceries. I had $0. I called the pawn shop and explained what happened. Dude cracked up laughing when I asked if anyone had turned it in, but said he would check. He comes back on the phone sounding like he had seen a ghost. Someone turned my money in.
You get out if life what you put in, simple as that.