Any debt incurred must be funded by bonds and approved by the voters in Texas. The bonds must be self-satisfying (meaning, they must include their own funding mechanism). Debt must not exceed 5% of State GDP.
New road? Must be a toll road. Loans to veterans? Must be paid back. Funds to build a new hospital? Paid back by patients who use it. Lots of bonds are paid off early, too.
VERY different from how a lot of states operate.
Texas has debt/gdp ratio of about 20% same as California.