Imagine walking into a shop and you see a pair of shoe priced at 20 hours of work instead of a specific amount of money and a phone could cost 200 hours.
Would there be a difference in the value of these hours of work, whether you spent 20 hours hating your job, or 200 hours doing something you like and enjoy?

After all, the value of any given "amount of time" depends on how we perceive it.
Would you still spend your money the same way you do now?
I suppose that little would have changed.
We are used to looking at prices in our local currency but we hardly think about how much time we have spent working just to gather up that money.
That is precisely why money was invented: so we wouldn’t have to burden our minds with strange thoughts about how much time we’ve had to spend working.
For someone earning very well, buying things might mean just some few hours of work
Especially if it’s someone else’s time (an employee’s time) which was purchased for next to nothing.
while someone earning small could spend weeks or even months for the same item.
Such is this unfair world.
Money does make busing and selling easy but sometimes we forget the time and effort behind what we spend.
Comparing personal income level with purchasing power (or with the incomes of others) can help keep this in perspective. Money (your salary) is a reflection of how effectively you use your time (which, incidentally, is a non-renewable resource).
If shops truly displays prices in the amount of hours we spent working along with the normal price, would people become more careful with the way they spend or would it still not make any difference?
Nothing would change. For the most part, people don't value their own time, as evidenced by the time spent on TV series, video games, or other "time-killers".
Would you think twice before buying something if you knew how many hours you had to work to pay for it?
Why not calculate the value of one hour of your time in monetary terms and compare it to current prices (expressed in a currency like the US dollar)? By doing this, you can determine exactly how many hours of your life it takes to purchase a given item. In other words, you simply need to convert the price of goods into the time required to earn them. That said, I suspect that even with this insight, most people wouldn’t actually change their consumption habits.
Furthermore, to make this experiment even more impactful, one could provide individuals with information on how many "discretionary" hours they actually have (that is, the time remaining after accounting for sleep, commuting, routine daily tasks, leisure, sick leave, and so on) before their total available time runs out.