Stuff like crisps, chocolate, pizza, hot dogs are all more filling
No they're not!!! Any nutritionist worth their salt will tell you they're full of empty calories!!
What I'm saying is telling people their kid is fat, when they have no money to improve their diets or time to cook from scratch or time to take them out for activities or funds for clubs and sports etc. Is just pushing the blame on to parents and kids
If your child is overweight than as a parent you are to blame.
Junk food is not cheaper than basic fruit and veg.
You don't need to spend hours whipping up culinary delights every night, just swap the side of oven chips for a side of broccoli/peas/carrots or whatever. Keep crisps and sweets for treats now and again, not a daily item. Get rid of the fizzy drinks and have water.
You don't need to spend money putting your kids in clubs, try doing activities as a family - your DC will thank you for it. DS has never been overweight and has never been in any clubs, but he either walks, cycles or runs with me EVERY DAY.
Time & money are just excuses.
DH and I between us work 80 hours a week and for 5 years (while DS was 3-8) I worked away during the week. We still manage to eat reasonable healthy meals and get plenty of exercise in and none of us are overweight.