What do you think about me taking my extra break time away from my workers at lunch time?
Why do you want to take time away for lunch from your workers?
To tell you the truth it's a profit for me, they're lazy and I need to speed them up.
It is understandable that you want to speed up your workers but taking way time for lunch is not the right way. You should respect your worker's time and work out a solution where they can work better instead of faster.
It's my new tactic, but it's morally acceptable to trick these workers into getting paid less.
That doesn't sound very nice, and your employers will eventually think you are being duplicitous with them. Why not just care for your workers since you rely on them doing a good job to continue making money.