If not the dealers card manipulation skills questioned, I'm sure. Point being that ethically, money shouldn't be taken off the table. $1 or $500. Using it to cover a dealer or using it for gas money on your ride home. Money taken out of play is wrong.
I make an exception for casinos, because dealers move around, shifts end, etc. Hard to tip them at the end of the night. While in a home game, the dealer isn't going anywhere.
In a Ohio card room I have visited multiple times, because of local laws, the dealers are not allowed to take chips off the table. That would be a rake, even if paid as a tip. Instead you can buy brown "tipping" chips. Brown chips that cannot play in hands. Those chips can be given directly to the dealer as a tip, because they were never in play, and thus are not a rake. Those chips are bought directly from the cage, and can not be sold back to the cage, so you effectively "tip" at the start of the night, and divide the chips amongst dealers as you wish (you may buy more by walking back to the cage, or buying them off another player).