If I want a hose clamp that isn't coming off, I ain't paying 25c a piece for them, I get a wire coathanger, use some of that and twist it up real tight. Held a radiator hose on one of my jalopies for 3+ years. On softer hoses, good quality zip ties can be pulled tight enough to make a good hold, you need a pair of vice grips and your lawnmower starting arm though.
I prefer the screw type hose clamps though. Watch out for the cheap ones, the tabs holding down the "nut" enclosure often pop off, when you tighten them hard.
Road Warrior
edit: oh by the way, for screw hose clamps, there's ones with just a nut shaped end, and there's ones that just have a crosscut screwdriver end, and there are ones that have both a nut and crosscut. I recommend the nut and crosscut ones. That way, you can use the nut if the screw slots chew up, or vice versa. There are some with a regular screwdriver slot instead of a crosscut, they tend to spread at the end, messing up both nut and slot, so the crosscut ones are better.