If I initiate an electronic transaction, where my bank balance goes down by $10, and yours up by $10, that's an exchange, even though nothing physically passed between us.
If I solicit you to do something for me (in exchange for money) that means you spend an hour doing something (therefore not having that time free, but freeing me from having to do it (therefore freeing up an hour of my time), a similar exchange has taken place.
Time can perish, but it can still be used as a currency.
> I'm merely saying that people find it to be more fair
fair enough. Then I disagree that this is true, without proof, and also disagree this is relevant, without justification. I'd assume most people that thing this are part of a group with more time than money.
Your toenail hypothetical, and much of the rest of your comment, entirely misses my point. I'm not saying we should do this or that. I'm merely saying that people find it to be more fair when there's a time requirement. That's not the same thing as "we should require people to spend time."