Books and movies (I'm no expert ) - why do you think they did?
Regardless of historical accuracy (or lack of it), I don't like to see klickys with bare feet. A couple, ok.. More... meh. So I think when I get this set, that chinese guy is changing legs...
Edit:
Thank you, that is what I meant.. Shoes were (me thinks, again, no expert - are you?) a luxury, not something "common folk" would have.
Movies and television are not a source for factual historical information.
Books can (and do) often have an agenda other than the transmission of historical facts.
No one considers North American Indians so poor they did not have shoes. We know they had footwear, moccasins being the most common known. Yet, they were much poorer than any peasant in Europe.
A quick study of the feudal system is in order. The feudal system developed from the Roman system of land owners and those who worked for them. (These often, but not always, used to be slaves before the Church was able to influence the land-owners to abolish slavery.)
The peasant was required to give a certain amount of their income/goods to the lord in turn for protection/assistance from the lord. The lord then paid a certain amount of their income to the lord above them. Up this went to the king - who in early middle ages (commonly known as the "Dark Ages") was king because the other lords chose him for his leadership ability. (It wasn't until later period the king of an area become hereditary through eldest born son.)
The service was both ways both to and from the lord. The lord had many requirements to the peasant. They had to provide shelter, food, protection, employment, etc. (Much like what you expect at work today in order to have an effective working environment - BUT - this extended to 24 hours a day, 365 days a year.)
Clothing is part of shelter and if people did not have adequate clothing, they could not live.
It was when a lord (or group of lords) became so greedy they did not uphold their end of the feudal contract that peasant revolts occurred. (Much like a strike or walkout at a workplace today when management does not uphold its end of a contract or fair labour practice.)
What month of the year is it commonly calculated at when your earnings are finally tax paid and free?
Now imagine you only had to pay a 10% tithe.
When would you have more money? Now or the "poor" middle ages?
Imagine your home needed repairs and your lord had to provide the materials and labour in order to fix it?
Imagine you never had a mortgage - but yet - your house and land stayed in your possession and your family's?
Imagine if you got married and all you had to do was to go out and stake a household for yourself and it was yours. No banks, no mortgage.
There was no interest ever charged in the Middle ages. If you bought something on credit you only paid off the amount of the original purchase.
No homeless. Contrary to some claimed belief, the poorest and sickest had the protection of the lord. If you left your lord (which you could do - there were certain situations depending upon local laws and customs and contracts) then you were no longer part of that feudal contract (just like if you quit work, they don't have to keep your dental benefits and sick days in place). However, you could contract with a new lord if you wanted. You could also just go out on your own and make your own way.
In the Middle Ages there were 150 days of Obligation. These are not including all the days of the Sabbath. So add up how many statutory holidays a year there were. (no unnecessary physical labour was allowed on Days of Obligation and Sundays)
And people think we are so "civilized" you get one measly day a month stat. holiday (not even!) and three weeks holidays?!
As for shoes, specifically. Look at any medieval period illustration.
No one questions they all wore hats. Why would they not have shoes?! It's completely absurd to think that people who would use every usable part of an animal they hunted would not use the hide for clothing and shoes. That's what the Indians did. Moccasins are made of soft leather - they make great soles for shoes. Same in Europe.
Depending upon where you lived shoes could be made of wood (and still are to this day!).
Shoes were hardly a luxury. Neither are they today. You can buy expensive shoes today just like you buy cheap ones.
Don't want shoes? Then wear sandals if your climate is hot. Winter time you wore boots.
Believe it or not, they even had socks and underwear in the middle ages!
If by expert you mean did I write my Masters in Medieval History on "Shoes of the Middle Ages", no. However, as an History Teacher (secondary) with ancient and medieval periods as part of the curriculum I had better know what I'm actually talking about. If I don't, I go to credible sources to research.