Let's say you wanted to give income from labor the same benefits as (negative) income from investments that lost money... How would you do that?
Say I earn a healthy $250K/year at my W-2 job. If I buy a large house with the proceeds from my job, have I incurred a loss? How about if I eat out at an expensive restaurant every night, spending my entire paycheck. Do I get to avoid taxes by keeping my lifestyle expensive?