I work in the pharmaceutical industry, and you would be AMAZED at how much money is spent each year on new compounds in the hopes that they can cure a condition or disease. The sad thing is, for safety or efficacy reasons, close to 95% of these new compounds never make it to market. Many people who have conditions such as cancer, or HIV Positive, or Hypercholesterolema, etc. have plenty of access to the thousands of clinical trials going on across the world right now. When subjects participate in these trials, they are made aware of any possible side effects or problems that can happen because of the compound. Still, even if a drug gets to market it can have side effects that the manufacturers were not made aware of. Sadly, that results in lawsuits and retaliation from the public so many companies are less and less willing to release compounds to market.
In case you're interested in how drugs are created and get to market, virtually all of them follow the process seen below;
1): Chemist develops new compound.
2): Compound is run through massive computer network which checks to see if it is similar to any known substance out there. (This helps in the next step).
3): The compound is simulated through an enormous computer system to see if it has any chance at being effective, and to see if it has any potentially deadly/disabling side effects.
4): If the compound passes step three, it goes into the animal testing phase to see if the drug will be safe in living beings.
5): If the drug passes the animal testing phase, it will be sent on to Phase 1 Clinical Trials. Phase 1 trials are done to see how safe the drug is in human beings and how human beings metabolise the compound. Minimal doses are used at this stage, and the trials typically last a few weeks.
6): The drug then goes on to Phase 2 trials where they are tested at various doses to see if they are effective at all, and to see what the optimal dose is. Most drugs die at this stage due to ineffectiveness, or poor safety characteristics.
7): If a drug is termed effective, longer term (Phase 3)trials take place to ensure that they are safe and no nasty side effects take place. (I believe it was durng Phase 3 Trials that Sildenafil Citrate was discovered to have positive benefits for ED Patients).

: After Phase 3 trials, drugs are typically sent off to the FDA and other approval agencies for mass marketing and distribution.
9): Once Phase 3 trials are done, Phase 4 trials take place. These are typically VERY long trials which take place over a course of 5 to 6 years to see if there are any long term effects from this drug. If any are ever found, the labels with the drugs are updated or if they are severe enough, the drugs are taken off the market.
All of this work requires work by a HUGE number of people (myself included) to ensure that they are safe and effective. All of these people need to be paid for their insane work hours and amount of work that goes into this. Hence why drugs aren't cheap.
Now what does all this have to do with the ability to cure a disease or illness? Well, most insurance companies won't pay for drugs that haven't passed their longer term clinical trials with flying colors. As a result, it may be more difficult for people to get these successful Phase 4 compounds. However, when participating in a clinical trial the drug and nearly all other tests and procedures are paid for by the sponsor. (The pharmaceutical company). So I really don't think the "money" helps people with diseases/illnesses. It's just that we hear more about celebrities who fight these diseases/conditions because of the fact that they are celebrities. There are certainly just as many people who aren't in the public spotlight who are fighting these diseases and winning.
I've been an insulin dependent diabetic for 26+ years now without ANY complications at all. That is nearly unheard of. So there are sick people out there who are just able to fight things off without problems. The human body is an incredible machine and we still don't know 1/100th of what it can do.
