So the $600 pre-refund of taxes that Bush2 put in place (which made a negligible increase in per paycheck take-home) and the SS 2% rebate by Obama (which had a similar result) were useless? No, they weren't, they were identified as having an impact on the economy, even though the money wasn't even in consumers hands when it was announced/started.
Minimum wage has nothing to do with minimum ability. It sets a price floor for labor. The people who lose out are those just above the minimum wage floor who see their less skilled/experienced/tenured coworkers elevated to a higher wage while theirs remains stagnant. (This happened to me, btw, and it sowed a short period of discord in that company)
For businesses with very small margins, the costs will be transferred pretty much one for one. As the margin of the business increases, the cost will be passed on in a proportionally smaller magnitude. People are (almost) never hired because they're "cheap" but because work needs to be done to meet demand. Just as nobody hires people if their taxes go down, or fire people if taxes rise. Might it delay hiring? In some instances it makes greater efficiency more valuable, with businesses investing in machines (which are built by people) instead of people. However most of the time it's just a cost of production. If you need to make more silk shirts and the cost of silk goes up, you don't buy less silk - you buy as much as you need to meet demand.