Weird question about lossless filesize

[sigma_sigma]

In my opinion a lossless audio file is a file wich is max archived to 80% from a wav file, is not an encoded file such mp3. I don't understant why does't exists an lossless "encoder" who can be capable to archieved a wav file at half size or less.
I presume there are 3 possible reasons:
1- is not developed yet a propper algorithm, maybe it is impossible to realize that at the momment..
2- there is no computer on market with so much power to can decompress the lossless format in real time to be played?
3-no interess about, cause of the big storage capabilities.

Maybe you think I'm an idiot or smth, but I'm very very curious to ask somebody to my question.

10x in advance!

[raquete]

In my opinion a lossless audio file is a file wich is max archived to 80% from a wav file80% is only a percentage..one number,not means that 80% can be lossless,depend of some factors.
lossless is when,no matter how much you compress you can back the file like the original again.
one real lossless is rar on .txt,when you unrar it you have the exact file,nothing change.
answering question 2:
i have read that ape,flac,wavpack,shorten are lossless,they can reduce the size for round 50/55% and can be played in real time.
one cool lossless is .rar the wav but you can't play .rar in pc(i think)

regards.