Love your username, btw.
In the early 2000s, our household income was £24K gross, so £18,000 take home. Our mortgage was low at around £300pcm, and we didn't/don't smoke, and rarely drank.
2 young DC and 2 (old) cheap cars, which we needed due to where we lived at the time, as housing in the countryside was much cheaper than local towns at the time, but public transport and amenities such as shops, etc, were few and far between.
We lived pretty frugally, with 2 basic £10 mobiles, the basic sky package (when on offer) and essential bills such as food, mortgage, home insurance, petrol and a £50pcm rainy day saving (when possible) taking pretty much all of our income, leaving very little to nothing left for fun money.
Our family activities revolved around local English Heritage visits (bought for us as a Christmas gift by our parents), to which we took a picnic and drinks, 1 or 2 yearly tickets for wildlife/outdoor places, cost at the time for a family ticket for the year was £30-40. Again, we'd take a pack up lunch/ snacks and drinks.
Other activities included weekend £1 cinema offer, so £4 total as we took our own snacks/ drinks (or £1.50/dc, but parent goes free, but that was a bit further away).
Going to the beach, park/ lake for a day out, and doing activities with them such as building sandcastles, looking for crabs etc, counting bugs, birds, etc. Or home based ones such as baking, treasure hunts, etc.
Soft play for 2 was about £4-5, and a tea was 80p with free water and squash for dc. You had a card and your 6th visit was free.
We couldn't afford holidays, except for The Sun £9.50 caravan ones.
Takeaways were a once a year thing (cost around £25), and meals out maybe once every few months, usually paid for with our (not dc's) birthday money (from parents).
As we hit the 2010s, wages were ~£34K gross, so we were able to go to places like Pizza Hut, Harvesters, Frankie and Benny's, etc as a treat maybe once a month, but that was with a total spend of around £35, & would include 2 child meals with 2 courses and a drink, tap water for the table, a refill come for my dh, and 2 adult mains with 1 starter and 1 pudding.
Even once the dc went onto adult meals, it was still doable (dc could choose between a starter or a pudding, but not both, and 1 drink each, plus water for the table. Cost was around £45, so still doable as a treat.
Recently we went back to Harvester with both dc, and the cost was over £100 for 4 Sunday lunch deals of 2 courses, plus 1 x soft drinks for 3 and an orange juice. The quality wasn't as nice, and the service was terrible, but it was packed with young families.
I'm not sure how they afford nowadays, tbh, but I don't envy them.
Food prices have been artificially low for years, I think, and we're used to that. Wages are low and stagnating, and life is hard for many. Money doesn't go as far as it used to.
Our household income is now just into 6 figures, and 15 years ago if you said we'd earn that, I'd have felt rich, and would assume we could do everything we want to whenever we want to on that kind of money, but the reality is far different as so many costs have risen, and whilst I'd say we're comfortable, I definitely don't feel rich and still budget for things.
I agree though, that if people can't afford to go out it will lead to the collapse of many places and all the jobs that are connected to it, which helps no one.
I'm not sure what the answer is, though.