Yes, we find many references in Shas and Medrash for things that merit parnosoh. They are all holy and true. What I am about to say does not mitigate this a bit.
When the Satmar Rov (Divrei Yoel) was asked about the known segulah of reciting Parshas Hamohn, he reportedly said openly that this is effective until 8:59 am. From 9:00, the person should use the segulah called working.
The concept of segulah, as we are using it in this discussion, is a trick that provides us with something that we did not otherwise earn. This is highly suspect, and I have trouble believing that this is the intended role. Picture a young able bodied person spending his day reciting Parshas Hamohn, and avoiding going to work. Shall we believe that this the intention of that segulah? I know I don’t. A segulah is a supplement that we can use to potentiate the activities we employ to accomplish a task. It is not a substitute. And it is sad that many approach segulos that way.
And many other things are also in this category. Davening by kivrei tzaddikim is a precious gem. Mekomos hakedoshim are particularly auspicious. But to treat a medical illness by refraining from medical care and sitting around in cemeteries, even by big tzaddikim is irresponsible. The velt seems to use segulos in a childish manner, to get them off the hook from being responsible. It’s time for a little maturity.