McDonalds are locally owned franchises, and those guys aren't getting crazy rich. People will not open McDonalds franchises if they have to pay $12/hr for each worker - the entire McDonald's business model would need to be revamped. I promise you, $12/hr means people getting fired and franchises that were on the edge getting borded up.
No. Possible some individuals wouldn't like it, but as a whole it would be a good thing.
Uh... no.
Basic needs of living do force you to work, but they don't force you to earn money, and they don't force you to work much - especially not these days. Plenty of farmers will tell you that they live entirely self-sufficiently, providing for all of their own needs. This has been done for thousands of years. But even if you don't want to farm, consider the following.
You don't need a house, that much has been proven by tons of people who live voluntarily without houses (in the US). You don't need a job because you can make enough money standing on the street corner to buy 10 times as many calories per day as you need. Calories to sustain life can be bought for like $1 or maybe $2 TOPS per day. You can make $20 in an hour standing on a street corner. Or you could recycle from dumpsters. But if you're too lazy to do that, there are tons of private charities that have you covered (salvation army for example). But even if you don't want to do that, the government also offers handouts... lots and lots of handouts. You don't need healthcare. Healthcare hasn't even existed for more than a tiny fraction of human existence. Shelter is free. Clothing is given away everywhere in the US (also found in the trash). Hell you can find enough food in the trash to sustain you. I've seen a homeless person (voluntarily homeless mind you, no one has to be homeless in the US as the government will house and feed you), grab bread out of the trash and start munching on it.
There is absolutely nothing, nothing at all forcing you to work. I can tell you exactly which parks to go to to talk to many folks who live without working every single day, and they'll tell you just how unnecessary it is and how those of us who work are all suckers when there's so much free stuff everywhere. So your claim is 100% NOT fact.