I'd say people have their own reasons for levelling alts. Not wanting to keep spending money on certain services is a reasonable one.
But also, this game has a big RP community, I'm an RPer and it's not uncommon for us to RP more than 1 character. I have several and the problems illustrated in this thread are apparent. And there are changes that could work better for alts.
Are they /needed/ per se? Like a lot of things, no. But also like a lot of things, they'd improve the experience, clear up problems for those who play alts, be nice to have and so on.