Its not waste if its actually required to do the job. Yes it seems wasteful to tarmac an area only to rip it up again a few months later, but the requirements on main contractors as to what they have to provide now aren't getting any less. The prelims on jobs I do for schools is easily over 10% of the overall cost of the job. And I do my best to keep it to a minimum! But its what's being asked of us now and in some ways, its nice the workforce are finally getting some decent facilities at their place of work.
How many times have we worked without a toilet even - its stone age lads!
We made do as we always will but we aren't going to get new people into the industry with that attitude. And quite frankly, the client wouldn't expect you to not have a toilet. Same argument for somewhere to eat and dry your clothes. Then some segregation from the public, stone or track mats to get you out the mud. More stone or matts to park vans on.... It easily builds up and that's before your inhouse safety officer tells you he wants more toilets for covid segregation, or a ladies toilet for the occasional lady tipper driver - he's not wrong but it all adds up!
And don't get me started on the non essential site setups that go on to try and win most considerate contractor of the year.... Now that is wasteful
But you get my point, site setups are only going to get more expensive too. Wont be long before owning your own welfare unit isn't that uncommon - a few of us already have one I know, but we are a forward thinking bunch on here