Who says you haven't touched the 75mil? I do love logic.... we haven't sold him yet, so the money we've spent can't possibly be related in any way to the 60+ million we know we're getting in a few weeks.
How much did Spurs spend after Bale left vs before he left? They had signed 4 players for well over half of what they spent last summer by mid August, they signed 3 more for around 45mil on the 30th of August and the Bale transfer officially went through on the 1st September.
You've spent what around £40mil already, just because it came before the Suarez signing absolutely in no way means you haven't touched the Suarez money.
As for injuries, I don't think anyone suggested Liverpool had no injuries, nor has anyone suggested it before. Every club has injuries, if a few key players miss a few games, that is pretty normal. When say 5 key players miss half a season you have a very bad year for injuries. When only a couple of players miss a few games and realistically only Sturridge's injury had significant effect, you would say Liverpool had an relatively easy year for injuries.
When Sturridge was injured, Suarez played every game afaik. When Suarez didn't play(his own fault through ban) Sturridge played every game. In other seasons that could have worked out as Suarez banned, Sturridge and Sterling injured all over the same 8 games.
Liverpool had a VERY good season in terms of injuries, when you had injuries, it was usually only 1-2 players at a time leaving you a more than strong team to put out, you didn't have many key players out for much time at all and I don't think there was one significant injury. If a striker misses 6-7 games in two spells with small niggles, you don't lose a lot of fitness of form. If that same striker does a knee ligament and misses 20 games, then struggles to find fitness and form it's very different. Most teams will have more injuries, a more significant injury, and more resultant poor form from the worse injuries than Liverpool managed last year.